Consulta: subjectFacets:"Histology"
Registros recuperados: 216
Data/hora: 16/06/2024 00:34:33

Somatic embryogenesis and in vitro plant regeneration from pejibaye adult plant leaf primordia
Provedor de dados: 86
Autores: Almeida,Marcílio de; Almeida,Cristina Vieira de.
The aim of this work was to evaluate a protocol for plant regeneration by means of somatic embryos obtained from isolated adult pejibaye leaf primordia, and to describe histological origin of embryos and morphogenetic response. Explants were cultivated in modified MS medium. Mesophyll parenchymatous cells originated meristemoids (preembryonic complex formation) induced with 7.1 µM BAP in the first two subculture periods. After polarized structures with 12.9 µM NAA and 3.55 µM BAP were formed in the third subculture, somatic embryos developed and regenerated normal plants. The mesophyll parenchymatous cells display high capacity of direct response to the auxin and cytokinin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bactris gasipaes; Histology; Micropropagation; Peach palm.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000900015

ANATOMICAL STUDIES OF IN VITRO ORGANOGENESIS INDUCED IN LEAF-DERIVED EXPLANTS OF PASSIONFRUIT
Provedor de dados: 86
Autores: GLORIA,BEATRIZ APPEZZATO DA; VIEIRA,MARIA LUCIA CARNEIRO; DORNELAS,MARCELO CARNIER.
With the aim of studying the organogenesis in vitro in Passiflora edulis Sims f. flavicarpa Deg., the passionfruit, leaf-derived explants were cultured on media containing NAA or BAP and incubated either in continuous darkness or in light. The histological events leading to de novo organ formation were evaluated. Darkness induces rhizogenesis in the presence of NAA, whereas direct shoot regeneration is stimulated by light and BAP. This latter condition is recommended for passionfruit micropropagation as several adventitious shoot buds were formed from meristemoids of parenchymal origin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passiflora; Tissue culture; Micropropagation; Histology.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999001100005

Supplementation with arginine in the diet of Nile tilapia reared in net cages
Provedor de dados: 86
Autores: Fujimoto,Rodrigo Yudi; Santos,Rudã Fernandes Brandão; Pala,Gabriela; Gallani,Sílvia Umeda; Valladão,Gustavo Moraes Ramos; Morais,Gisele Cavalcante; Lee,James Tony; Sousa,Natalino da Costa; Cunha,Fernanda dos Santos; Maria,Alexandre Nizio; Carneiro,Paulo César Falanghe; Pilarski,Fabiana.
Abstract: The objective of this work was to evaluate the effect of dietary arginine concentrations on the health status of Nile tilapia (Oreochromis niloticus) cultivated in cages. The experiment was carried out in a completely randomized design with four treatments (2.3, 2.9, 3.5, and 4.1% arginine in dry matter) and three replicates, in 12 net cages of 8 m3, containing 4,000 sexually reverted tilapia (63±20 g, at 500 fish m-3). Fish productive performance and health were evaluated. Biochemical, hematological, and immunological parameters, as well as the morphological aspects of gills and liver, were evaluated. Arginine inclusion did not cause significant differences in fish growth performance. However, arginine supplementation at 3.5% concentration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oreochromis niloticus; Biochemistry; Haematology; Histology; Nutritional requirement.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101105

Peppermint essential oil as an anesthetic for and toxicity to juvenile silver catfish
Provedor de dados: 86
Autores: Spanghero,Diogo Bessa Neves; Spanghero,Emília Carolina Alencar de Medeiros; Pedron,Janaína dos Santos; Chagas,Edsandra Campos; Chaves,Francisco Célio Maia; Zaniboni-Filho,Evoy.
Abstract: The objective of this work was to evaluate peppermint (Mentha piperita) essential oil toxicity to and potential as an anesthetic for juvenile silver catfish (Rhamdia quelen). To determine the lethal concentration at 4 hours (LC50-4h), 210 fish (3.08±0.8 g and 7.59±0.67 cm) were exposed to 0, 20, 50, 80, 110, and 140 mg L-1 essential oil. To evaluate the anesthetic potential, nine fish were individually exposed to each oil concentration (50, 80, 110, and 140 mg L-1) used. Water quality parameters were controlled. The mortality rate and the severity and extent of the gill injuries of silver catfish juveniles at 4 hours of exposure increased with increasing peppermint essential oil concentrations, with LC50-4h estimated to be 75.06 mg L-1. The main...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mentha piperita; Rhamdia quelen; Anesthesia; Gill; Histology; Lethal concentration.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101102

Reproductive performance of silver catfish fed sorghum diets supplemented with phytase
Provedor de dados: 86
Autores: Rodrigues,Mariana Lins; Sanchez,Milena Souza dos Santos; Damasceno,Danielle Zanerato; Bittencourt,Fábio; Reidel,Adilson; Barrero,Nelson Mauricio Lopera; Signor,Altevir.
Abstract: The objective of this work was to evaluate the reproductive performance of silver catfish (Rhamdia quelen) fed diets containing sorghum, as a replacement for corn, supplemented or not with phytase. The experiment was carried out with 360 fish, with 16.02±0.58 g mean initial weight, fed diets in which low-tannin sorghum replaced corn at 0, 50, and 100%, with or without phytase supplementation (1,500 FTU per kilogram of feed). Diets supplemented with phytase or with 100% sorghum led to a reduction of visceral fat deposition and hepatic mass in males. In females, similar results were observed for diets containing phytase. Females fed sorghum-only diets, supplemented or not with phytase, had bigger oocytes. Males and females at the developing and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhamdia quelen; Alternative food; Breeding nutrition; Histology; Quality of gametes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800623

The Role of Plant Growth Regulators in the Development of in vitro Flowering, Histology and Ultrastructural Studies in Impatiens balsamina cv. Dwarf Bush
Provedor de dados: 87
Autores: MOHAMED,N.; TAHA,R.M.; RAZAK,U.N.A.A.; ELIAS,H.
ABSTRACT: An efficient protocol for in vitro flowering was successfully established for Impatiens balsamina cv Dwarf Bush, an important medicinal plant, through tissue culture techniques. Shoot, stem and petiole explants obtained from 4 week-old aseptic seedlings cultured on MS medium supplemented with different concentrations of plant growth regulator (PGR) were used for in vitro flower induction. Gibberellic acid (GA3), benzylaminopurine (BAP) and kinetin (Kin) treatment singly applied in MS media (pH 5.8), could all stimulate flowering at 23-26 oC with photoperiod of 16 hours light and 8 hours dark. It was observed that shoot explants were more responsive than stem explants in floral formation. Regeneration was achieved via direct organogenesis. For...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vitro regeneration; Ultrastructural; Histology; Gibberellic acid; Flowering response.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100211

Localization of the cotyledon reserves of Theobroma grandiflorum (Willd. ex Spreng.) K. Schum., T. subincanum Mart., T. bicolor Bonpl. and their analogies with T. cacao L.
Provedor de dados: 88
Autores: Martini,Maria Helena; Lenci,Camila Gonçalves; Figueira,Antonio; Tavares,Débora de Queiroz.
Cotyledon mesophyll cell morphology and lipid and protein synthesis of T. grandiflorum, T. subincanum and T. bicolor were analyzed and compared with T. cacao. These species possess foliar cotyledons folded around the hypocotyl radicle axis, typical of Sterculiaceae. Fruit size, morphology and weight are very distinct amongst the four species and so are the respective seeds. The main axis of the T. grandiflorum and T. bicolor seeds measured about 30 mm, while T. subincanum and T. cacao seeds measured 17 mm and 26 mm respectively. The seed weights of T. grandiflorum, T. bicolor, T. subincanum and T. cacao were 11.6 g, 9.4 g, 2.1 g and 3.0 g, respectively. The cotyledon mesophylls of the four species contained mainly polysaccharides and lipid-protein reserve...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Comparative study; Histology; Reserves quantity; Theobroma.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000100013

Histological changes in banana explants, cv. Nanicão (Musa spp., Group AAA), submitted to different auxins for induction of somatic embryogenesis
Provedor de dados: 88
Autores: FILIPPI,SILVIA BALBÃO; APPEZZATO-DA-GLÓRIA,BEATRIZ; RODRIGUEZ,ADRIANA PINHEIRO MARTINELLI.
The present work analyzes the behavior of banana explants, cv. Nanicão (Musa spp. Group AAA) regarding somatic embryogenesis induction treatments with several auxins. Longitudinal segments of shoot meristematic apices of micropropagated banana plantlets cultivated and rooted in vitro were introduced in culture medium containing dicamba, picloram, 2,4-D or NAA in different concentrations. Explant samples were collected at 0, 7 and 10 days and prepared for light microscopy. Histological sections were used for comparison of the histological changes occurring after induction treatment with different auxins. Embryogenic response was observed only in treatments with picloram or dicamba, with distinct embryogenic regions observed at 14 and 21 days in culture,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Somatic embryos; Dicamba; Picloram; Banana.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500015

Effect of Feeding Transcarpathian Zeolite on Gastrointestinal Morphology and Function in Broiler Chickens
Provedor de dados: 89
Autores: Wawrzyniak,A; Kapica,M; Stępień-Pyśniak,D; Szewerniak,R; Olejarska,A; Jarosz,Ł.
ABSTRACT Many kinds of feed additives can be used in chicken diets to stimulate intestinal morphological maturation and, consequently, intestinal function. The purpose of this study was to evaluate the effect of zeolite on broiler performance, gut morphology and gut digestive enzyme activity. The one-day old broiler chickens Ross 308 were assigned randomly into 3 groups with 30 birds per treatment. The 3 dietary treatments were: basal diet only (control group), basal diet + 2% zeolite, basal diet + 3% zeolite. Morphological and morphometric intestinal assessments were conducted using a light microscope. There was observed increase in villus height, villus perimeter, villus section area and crypt depth throughout duodenum and mid jejunum of the broilers fed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestive enzyme; Histology; Small intestine; Zeolite.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400737

Structural Differences of the Harderian Gland between Common Pheasants (Phasianus Colchicus Talischensis) and Hybrids of Italian Amber and Common Pheasants
Provedor de dados: 89
Autores: Klećkowska-Nawrot,J; Goździewska-Harłajczuk,K; Kowalczyk,A; Łukaszewicz,E; Nowaczyk,R.
ABSTRACT The aim of the present study was to demonstrate the histological and histochemical structure of the Harderian gland in wild and hybrid of wild and domestic birds. The samples were stained with haematoxylin-eosin, methyl green-pyronin Y, periodic acid-Schiff, alcian blue pH 2.5, aldehyde fuchsin and Hale's dialyzed iron staining's. In both species, the glands had multilobar tubuloacinar structure type I. The Harderian gland was located in the orbit near the inter-orbital septum, between the medial rectus muscle, the pyramidal muscle of the third eyelid, and the ventral oblique muscle. In the common pheasant, the gland was wider in the proximal and distal part. The common pheasant had more elongated lobes of the Harderian gland than in the hybrid....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Harderian gland; Histology; Histochemistry; Common pheasant; Hybrid of Italian amber and common pheasant.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200309

Comparison of techniques for tibial dyschondroplasia assessment in broiler chickens
Provedor de dados: 89
Autores: Almeida Paz,ICL; Mendes,AA; Takita,TS; Vulcano,LC; Guerra,PC; Wechsler,FS; Garcia,RG; Takahashi,SE; Moreira,J; Pelícia,K; Komiyama,CM; Quinteiro,RR.
This study was carried out at Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brazil, with the objective of evaluating the efficacy of four techniques in the assessment of tibial dyschondroplasia lesions in broiler chickens. Four hundred Cobb male chicks were reared from 1 to 39 days of age. At 39 days, forty birds were selected and tibial dyschondroplasia status was assessed by four different techniques: evaluation using the lixiscope, macroscopic examination, histological examination and bone mineral density assessment using optical radiographic densitometry. The efficacy of each technique to assess dyschondroplasia lesions in the tibial growth plate was determined in comparison to histology, which was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Lixiscope; Macroscopic lesions; Optical radiographic densitometry; Tibial dyschondroplasia.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100005

Evaluation of a radiographic method to detect tibial dyschondroplasia lesions in broilers
Provedor de dados: 89
Autores: Pelicia,K; Aparecido Jr,IM; Garcia,EA; Molino,AB; Santos,GC; Berto,DA; Vieira Filho,JA; Murakami,ESM; Montenegro,AT; Silva,AM.
This study aimed at developing radiographic techniques for the early detection of dyschondroplastic lesions in the tibia of broilers. The experiment was carried out at the facilities of UNIFOR/MG and Formiga and UNIFENAS/ Alfenas with 420 one-day-old male Cobb broilers. At 20 days of age, all birds were radiographed and identified with an alpha-numeric metal ring in the right leg. At 40 days of age, 42 broilers previously selected as a function of bone mineral density and lesion thickness scores were again radiographed and scored, and then sacrificed. Their right tibia was removed for gross and histological examination of the growth plate. The results showed that radiographic techniques are correlated with gross and histological examination and that there...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler production; Histology; Gross examination; Radio-diagnosis; Tibia.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200007

Rubus alutaceus (Rosaceae), a new species for Colombia with agronomic potential
Provedor de dados: 94
Autores: Moreno–Medina,Brigitte Liliana; Casierra–Posada,Fánor; Albesiano,Sofía.
Abstract  In Gachantivá, Colombia, Rubus alutaceus has been used for commercial purposes for more than one decade but so far with unknown taxonomic identity. For its identification, the anatomical and morphological characteristics of its flowers, fruits, leaves, stems, and seeds, as well as the physicochemical characteristics of its fruits such as color, equatorial and polar diameter, fresh weight, pH and total soluble solids (TSS), were studied. Qualitative and quantitative morphological parameters were evaluated, and longitudinal and transverse cuts were made for histological studies. The plants were found to have trifoliate and pentafoliate leaves; whitish–yellow subglobose polydrupes, fully mature fruits with 8.8°Brix TSS; elliptical, subglobose seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium oxalate crystals; Colleters; Histology; Taxonomic novelty; Postharvest parameters.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000200201

Gonadal development and reproductive period of the characin Astyanax aff. bimaculatus (Characiformes: Characidae) in a tropical reservoir in southeastern Brazil
Provedor de dados: 103
Autores: Araújo,Francisco G.; Nascimento,Aparecida A.; Gomes,Iracema D.; Sales,Armando; Oliveira,Beatriz A. Chagas de.
ABSTRACT The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia primary and secondary, spermatocyte primary and secondary, spermatid and spermatozoa. The spawning occurs most of the year, peaking in January-February, as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater fish; Histology; Oocyte; Spawning type; Spermatocyte.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100326

Ultrastructure of the dermal chromatophores in the Fringe-toed lizard, Acanthodactylus orientalis
Provedor de dados: 103
Autores: Paray,Bilal A.; Al-Sadoon,Mohammed K.
ABSTRACT Histology and electron microscopic studies of the dorsal skin of the Fringe-toed lizard, Acanthodactylus orientalis Angel, 1936, showed three types of dermal chromatophores: xanthophores, iridophores and melanophores. These pigment cells were observed in vertical combination, with an uppermost layer of xanthophores, an intermediate layer of iridophores and a basal layer of melanophores. The ultrastructure of the melanophore is characterized by oval nucleus and numerous pigment granules, the melanosomes of different stages that remain scattered in the cytoplasm. The chromatophores of this species contain significant information of anatomical similarity with lower as well as higher vertebrates. They can help to better understand the inter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Xanthophores; Lridophores; Melanosomes; Anatomical significance.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100301

Two new land planarian species (Platyhelminthes: Tricladida) from the Brazilian Atlantic Forest
Provedor de dados: 103
Autores: Almeida,Ana Laura; Kishimoto,Raquel Gualda; Carbayo,Fernando.
The Brazilian Atlantic Forest harbors the world's richest areas of land planarians (Platyhelminthes: Tricladida). Nevertheless, the number of undiscovered species from this biological unit remains seemingly high. Herein we describe Geoplana piriana Almeida &amp;amp; Carbayo, sp. nov. from the state of Rio de Janeiro, and Geoplana tingauna Kishimoto &amp;amp; Carbayo, sp. nov. from the state of Santa Catarina. Each species shows a dorsum with a unique color pattern among Geoplaninae species. Their internal morphology also differs: G. piriana sp. nov. shows a unique combination of features, including an extrabulbar, non-bifurcated prostatic vesicle, a non-folded male atrium, a horizontal, cylindrical penis papilla, a female atrium anteriorly narrowed, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flatworms; Geoplaninae; Histology; Taxonomy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000500006

The microanatomy of the central nervous system and brain of the Indo-Pacific seahorse, Hippocampus barbouri, during development
Provedor de dados: 103
Autores: Senarat,Sinlapachai; Kettratad,Jes; Kaneko,Gen; Kamnurdnin,Thatpon; Sudtongkong,Chanyut.
ABSTRACT The central nervous system (CNS) of Teleostei is a complex system of self-governance and its morphology is reflected in the physiological and reproductive behaviors. The Indo-Pacific seahorse, Hippocampus barbouri Jordan &amp; Richard son, 1908, is a new candidate species for aquaculture in Thailand. In this study, we investigated the brain morphology of H. barbouri across various developmental windows. Light microscopic observations of adult brains revealed a large optic tectum in the mesencephalon, whereas the cerebral hemispheres and the cerebellum are of medium size. The detailed brain structures were generally similar to those of other teleosts; however, only five distinct layers were present in the optic tectum, including the stratum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Seahorse; Spinal cord; Thailand.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702020000100327

Comparative studies on the histology and ultrastructure of the siphons of two species of Tellinidae (Mollusca: Bivalvia) from Brazil
Provedor de dados: 103
Autores: Vitonis,João E.V.V.; Zaniratto,Cristiane P.; Machado,Fabrizio M.; Passos,Flávio D.
Despite the great importance of the siphons for infaunal bivalves, only a few studies have examined their tissues using histology techniques or scanning electron microscopy. In the present study, the siphons of Tellina lineata Turton, 1819 and Macoma biota Arruda &amp;amp; Domaneschi, 2005 were investigated. The siphon walls are composed by a series of muscle sheets of longitudinal ("L"), circular ("C") and radial ("R") fibers, with a clear pattern common to both species: there is a main median longitudinal layer (Lm), and two peripheral circular layers, one inner (Ci) and one outer (Co), near the epithelia. A median circular layer (Cm) separates an internal (Lmi) from an outer (Lmo) median longitudinal layer. Further, the Co is split by a thin outer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciliated receptors; Histology; Musculature; Tellinoidea.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000300005

Gonadal development and fecundity of the smooth weakfish Cynoscion leiarchus (Teleostei: Perciformes: Sciaenidae) in a tropical Brazilian bay
Provedor de dados: 103
Autores: Silva,José P. do Carmo; Costa,Marcus R. da; Gomes,Iracema D.; Araújo,Francisco G.
ABSTRACT Cynoscion leiarchus (Cuvier, 1830) is a coastal fish species that is widely distributed along the Western Atlantic coast, from Belize to Southern Brazil. In Brazil, C. leiarchus It is an important resource for commercial and artisanal fisheries. Our objective was to describe the oogenesis and spermatogenesis stages of the species and to estimate batch size and relative fecundity of a population at a tropical bay in southeastern Brazil. The examined specimens were obtained from artisanal catches that took place from July 2013 to June 2014. A total of 18 individuals (11 females and 7 males) were examined for histological analysis and 20 spawning-capable females were used to estimate fecundity. Five stages of oocyte development (primary growth,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Oocyte; Reproductive tactics; Sepetiba Bay.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000600500

Reproductive biology and recruitment of bluefish Pomatomus saltatrix (Perciformes: Pomatomidae) in the southwestern Atlantic
Provedor de dados: 103
Autores: Souza,Geysa Marinho de; Monteiro-Neto,Cassiano; Costa,Marcus Rodrigues da; Bastos,Ana Luiza; Martins,Raquel Rennó Mascarenhas; Vieira,Francyne Carolina dos Santos; Andrade-Tubino,Magda Fernandes de; Tubino,Rafael de Almeida.
ABSTRACT The bluefish, Pomatomus saltatrix (Linneus 1766) is captured by industrial, artisanal, and recreational fisheries throughout its distribution range. The reproductive biology of P. saltatrix in the southwestern Atlantic was studied using 1,102 specimens captured by the Brazilian commercial fleet between March 2014 and December 2015. The recruitment period was identified from records of juveniles in experimental beach seine hauls carried out on sandy beaches in the external sector of Guanabara Bay for four years (2012-2015). Based on the reproductive indices and on the macro- and microscopic analyses of the gonads, spawning peaks were identified in autumn and spring. The size at first maturity was estimated at 35.5, 38.3, and 37.4 cm for females,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fecundity; Histology; Oocyte development; Reproductive dynamics; Spawning seasons; Young-of-the-year.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702021000100301

DETERMINATION OF STANDARD GILL MORPHOLOGY OF PACU (PIARACTUS MESOPOTAMICUS)
Provedor de dados: 22
Autores: Alves, Luiz Fernando de Souza; Saravy, Taiany Miranda; Baldo, Grace Alessandra Araújo; Gabriel, Andrea Maria de Araújo; Cavichiolo, Fabiana.
To pathological assessments or recognition of changes in the morphology of these is necessary knowledge of a normal morphological pattern, being this then the goal of this study. Were collected 20 animals (Piaractus mesopotamicus), from cultivation environments the region of Grande Dourados, with total length of 35 cm and 750 g approximately. During data collection, the animals were anesthetized with benzocaine, euthanized and dissected for macroscopic evaluation of organs "in situ". After, collected the gills, fixed in Bouin solution and stained by the usual method Hematoxylin-eosin and alcian blue technique+ PAS. Macroscopically it was observed that these had brilliant crimson red coloration, located internally, protected by beeswax, with numerous traces...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Gill morphology; Teleosts.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14316

Canine skin and soft tissue tumors - Clinical and cytohistological study
Provedor de dados: 195
Autores: Chalita, Maria Carolina Catai; Matera, Julia Maria; Alves, Maria Teresa de Seixas; Longatto Filho, Adhemar.
Over the course of 17 months, non-aspiration fine needle (21-27G) cytology was performed on 213 dogs with 300 skin and soft tissue tumors. The smears were air dried and stained by the Rosenfeld method. There were 119 males (56%) and 94 females (44%), the majority of at least 6 years of age (75%). Mongrel dogs were over-represented (n=74), followed by Boxer (n=21), Poodle (n=18), German Shepard (n=15), Cocker Spaniel (n=12), and Doberman Pinscher (n= 11). In 40% of the cases (85 dogs, 117Iesions), histological evaluation was available to compare with the cytologic results. In this group, 77 specimens were benign (22 non-neoplastic and 55 neoplastic) and 40 malignant. Tumors were represented by 19%non-neoplastic lesions, 36% epithelial tumors, 30%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neoplasms; Skin; Citology; Histology; Dogs Neoplasia. Piel. Citología. Histología. Perros neoplasia; Pele; Citologia; Histologia; Cães.
Ano: 2002
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3270

Intestinal histomorphology in Pseudoplatystoma fasciatum fed bovine colostrum as source of protein and bioactive peptides
Provedor de dados: 63
Autores: Rodrigues,Ana Paula Oeda; Pauletti,Patricia; Kindlein,Liris; Delgado,Eduardo Francisquine; Cyrino,José Eurico Possebon; Machado-Neto,Raul.
Histological responses of the intestine are key for evaluating nutritional value of feed ingredients, since the organ is not only the chief site of feed digestion and nutrient absorption but also plays an important immunological function. Histomorphological alterations were evaluated in the intestine of juvenile striped catfish, Pseudoplatystoma fasciatum, fed diets containing 0 (control), 10 or 20% inclusion of lyophilized bovine colostrum (LBC), as source of protein or bioactive peptides, for either 30 or 60 days. Fish fed 20LBC presented at 60d a distinct pattern of macrophages and, some of them, higher number of vacuoles in rectum mucosa. The thickness of the muscle layer (TML) in fish fed diets with LBC was higher in the first portion of medium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gut absorption; Histology; Mammal protein; Lyophilized bovine colostrum; Striped catfish.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500005

Effects of melamine and urea formaldehyde contamination in nile tilapia (Oreochromis niloticus) diets on growth performance, economic loss and toxicity appearance characteristic index
Provedor de dados: 106
Autores: Aruneepong Srisathaporn; Jowaman Khajarern; Prapas Chalorkpunrut; Bundit Tengjroenkul.
A study was performed to evaluate the effects of melamine (Me) and urea formaldehyde (UF) combinations in diets on growth performance, and characterization of toxicity appearance. The combinations of three levels of Me and UF (0.5, 1.0 and 2.0%) were conducted with one control (no addition) in a completely randomized design (CRD). Four hundred and eighty mixed-sex fish with the initial weight of 9.67±0.03 g were assigned to 10 dietary treatments with 3 replications and fed for 6 weeks. No interaction was observed between Me and UF in this study. However, significant differences (P&lt;0.05) in growth performance, feed efficiency and survival rate (SR) between the control and the fish fed with Me and UF combinations were observed. The body weight (BW) and...
Tipo: PhysicalObject
Palavras-chave: Nile tilapia; Oreochromis niloticus; Melamine; Urea formaldehyde; Histology; Production index; Microscope; Growth performance; Toxicity; Feed efficiency; Survival rate; Diet contamination; ปลานิล; เมลามีน; ยูเรียฟอร์มัลดีไฮด์; สารเสริมอาหาร; ดัชนีผลผลิต; กล้องจุลทรรศน์; สมรรถนะการผลิต; การเจริญเติบโต; ประสิทธิภาพการใช้อาหาร; อัตราการรอดตาย; การปนเปื้อน; จุลพยาธิวิทยา.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5766

Toxicity of fixed oil and crude extract from sa-dao-thiam, Azadirachta excelsa (Jack) seed kernel to Aedes aegypti (L.)
Provedor de dados: 106
Autores: Ekkarat Kaewnang-O; Aran Ngampongsai; Sanan Subhadhirasakul; Teerapol Srichana.
Larvicidal activity of various concentrations of fixed oil and crude extract from sa-dao-thiam, Azadirachta excelsa (Jack) seed kernel was assayed on an Aedes aegypti (L.) test population under controlled laboratory conditions. Concentration levels of responses at 24, 48, 72, and 96 hrs were evaluated. The LC50 values of the fixed oil and the crude extract were 403.6 and 518.7 ppm, respectively. One hundred percent mortality in 24 hrs-post treatment was achieved at 2,000 and 4,000 ppm for the oil and crude extract, respectively. It suggested that the oil is more toxic to Ae. aegypti larvae than the crude extract. Further investigation suggested the occurrence of molting inhibition of Ae. aegypti larvae by the fixed oil and crude extract as indicated by the...
Tipo: Collection
Palavras-chave: Azadirachta excelsa; Aedes aegypti; Toxicity; Development; Histology; สะเดาเทียม; สารสกัด; ยุงลาย; ความเป็นพิษ; ผลตกค้าง; อัตราการรอด.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5218

Aspectos gametogênicos e histoquímicos de Iphigenia brasiliana (Lamarck) (Bivalvia, Donacidae) da Lagoa de Itaipu, Niterói, Rio de Janeiro, Brasil
Provedor de dados: 104
Autores: Mesquita,Eliana de Fátima Marques de; Abreu,Marta Guimarães de; Lima,Francisco Carlos de.
Gametogenic and histochemical aspects of an edible bivalve, lphigenia brasiliana (Lamarek, 1818) from Itaipu Lagoon, Niterói, State of Rio de Janeiro, were studied. Between May 1998 and October 1999 a total of 120 clams were picked up. Samples of 10 animals were collected once a month. Specimens were fixed in Bouin's fixative for 4 hours or less and transferred to 10% formalin for 24 hours. The shell lenght has been measured with the valves lightly opened to permit the penetration of fixative solution deeply in the tissues. Transverse sections including digestive diverticula, mantle, gills, gonad and foot were obtained from the total body. After fixative treatment, tissues sections were embedded in paraffin, cut routinely at 5 µm and stained with Harris's...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gametogenic cycle; Histology; Special-staining methods; Iphigenia brasiliana; Ltaipu Lagoon; Brazil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000200023

Aspectos reprodutivos de Sphoeroides greeleyi (Gilbert), Pisces, Osteichthyes, Tetraodontidae, da gamboa do Baguaçu, Baia De Paranaguá, Paraná, Brasil
Provedor de dados: 104
Autores: Schultz,Yart Damasceno; Favaro,Luís Fernando; Spach,Henry Louis.
The present study analyses the reproductive aspects of Sphoeroides greeleyi (Gilbert, 1900), such as morphology and histochemistry of carbohydrates in the oogenesis phases, maturity scale, time and type of spawn, sexual rate and first ripened mature size for females. From the monthly captured animais (Nov 1998 to Nov 1999) the morphometric data (entire length and total weight) were extracted and the sex and the gonadal maturity were determined. Some ovaries were prepared for microscopic analysis that charac-terized six phases for the development of the ovarian folheies. Through the carbohydrates analysis the acid carbohydrates could be related to the oogenesis maintenance and the neutral carbohydrates to the beginning of embryonic development. A maturity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Reproduetion; Histology; Histochemistry.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100004

The exocrine glands of swarming females and physogastric queens of Cornitermes cumulans (Kollar) (Isoptera, Termitidae, Nasutitermitinae)
Provedor de dados: 104
Autores: Ignatti,Ana Cristina; Costa-Leonardo,Ana Maria.
The histological study of the exocrine glands in the swarming females showed the presence of tergal glands, mandibular glands, salivary glands and sternal glands. Tergal and sternal glands are not developed in the physogastric queens, probably, because of a regression process. The development of mandibular glands is similar in swarming females and physogastric queens.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoptera; Glandular system; Exocrine glands; Histology; Physogastric queens; Termite.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400007

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)
Provedor de dados: 104
Autores: Oliveira Ribeiro,Ciro Alberto de; Fanta,Edith.
The digestive system of Trichomycterus brasiliensis (Lütken, 1874), a small sized tropical Teleostean fish widely distributed in South America, was studied. Tissue samples were prepared for light and scanning electron microscopy (SEM). Trichomycterus brasiliensis shows stratified esophagus epithelium with taste buds and goblet cells with neutral and acid mucus at the anterior region. The stomach is caecal, presenting a pyloric valve with neutral mucus cells. At the terminal portion it is surrounded by a thick muscular wall. The intestine shows two loops; the epithelium is single columnar, with acid and neutral mucus in goblet cells. Multicellular intestinal glands are absent. Granular cells are often seen in the mucosa, less in the submucosa but were not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Teleostei; Digestive tube; Histology.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400007

Descrição histológica de gônadas de traíra Hoplias malabaricus (Bloch) (Osteichthyes, Erythrinidae) da barragem do rio Gramame, Alhandra, Paraíba, Brasil
Provedor de dados: 104
Autores: Marques,Débora K.S.; Rosa,Ierecê de Lucena; Gurgel,Hélio de Castro B.
The reproductive cycle of Hoplias malabaricus Bloch, 1794, was studied through histological preparations, based on 102 specimens collected in the Gramame reservoir, Paraiba State, from August 1993 to July 1994. Seven developmental stages were identified for the feminine gametes and five for the masculine gametes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hoplias malabaricus; Gramame reservoir; Histology; Gonads.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300002

Reprodução do peixe-rei, Atherinella brasiliensis (Quoy &amp;amp; Gaimard) (Atheriniformes, Atherinidae), em uma planície de maré adjacente à gamboa do Baguaçu, Baía de Paranaguá, Paraná, Brasil
Provedor de dados: 104
Autores: Favaro,Luís Fernando; Lopes,Sabine de C. G.; Spach,Henry Louis.
The present study investigated the reproductive biology of silverside, Atherinella brasiliensis (Quoy &amp;amp; Gaimard, 1825) in a tidal flat of Paranaguá Bay, littoral of Paraná State, Brazil. Fish were captured monthly from November 1998 to October 1999 by the mean of a seine-net. For each individual, total body length, total weight, sex, and gonadal weight were recorded. Gonadal development stages were also defined based on the histological examination of the ovaries and on the visual aspects of the testes. It was defined that the reproductive period of A. brasiliensis extends from June to December, based on he analyses of individual gonadosomatic index (GSI) values distribution in relation to the sampling periods, on the monthly variation of the GSI...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Reproductive biology; Tidal flat.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300022

Desenvolvimento pós-embrionário do intestino médio de Dermatobia hominis (Linnaeus Jr.) (Diptera, Cuterebridae)
Provedor de dados: 104
Autores: Lello,Edy de; Vieira,Ana Maria.
Dermatobia hominis (Linnaeus, 1781) midgut is internally lined by an epithelium of polytenic cells, some low others prismatic with well developed brush border. Their apical portion are enlarged by secretory vesicles, forming button-like structures that are pinched off to the lumen, some accompained by the nucleus characterizing apocrine and holocrine secretions. This epithelium is gradually renewed by small, non polytenic regenerative cells, found scattered at its basal portion. At the end of the third instar the metamorphosis begins. The epithelial cells present signs of degeneration and at the first day of pupation the regenerative cells increase in number. By the 5th day of pupation these regenerative cells, besides being increased in number,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Dermatobia hominis; Midgut; Metamorphosis; Histology; Post-embryonic development.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100009

Redescrição de Choeradoplana iheringi Graff (Platyhelminthes, Tricladida, Terricola)
Provedor de dados: 104
Autores: Leal-Zanchet,Ana Maria; Souza,Simone Aparecida de.
Choeradoplana iheringi Graff, 1899 was described on specimens proceeding from Taquara, Rio Grande do Sul, Brazil. Afterwards, RIESTER (1938), MARCUS (1951) and FROEHLICH (1955) analyzed specimens from southeast Brazil, identifying them as C. iheringi. In this study samples of C. iheringi from São Francisco de Paula, a site next to the type-locality, and specimens from the Southeast (Salesópolis, state of São Paulo), are comparatively analyzed. It was observed that the external morphology of the specimens from São Francisco de Paula and from Salesópolis is concordant with the original description of C. iheringi, as well as that by RIESTER (1938) and MARCUS (1951). The pharynx is better designated as bell-form, and not collar-form as described by GRAFF...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geoplaninae; Taxonomy; Anatomy; Histology.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300026

Desenvolvimento pós-embrionário do intestino anterior de Dermatobia hominis (Linnaeus Jr.) (Diptera, Cuterebridae)
Provedor de dados: 104
Autores: Vieira,Ana Maria; Lello,Edy de.
Foregut in D. hominis (Linnaeus Jr., 1781) as the majority of the larval Diptera somatic tissue, is made up of polytenic cells, and grows at the expenses of the polytenization of its nuclei followed by the increase in size of each cell. The oesophagus, of ectodermic origem, is interiorly covered by a chitinous squamous epithelium that rests upon a very thin basal lamina. This sheet is surrounded by thick muscle bundles. The oesophagus intussuscepts the midgut forming the cardia. The cardia, with three epithelial layers: two internal ones, of ectodermal origin and one external of endodermic origin. At the anterior portion of the cardia, between these two types of epithelium, there is a cluster of small, non polytenic cells, forming the imaginal disk of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Dermatobia hominis; Foregut; Cardia; Metamoiphosis; Histology; Post-embryonic development.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100008

Acute toxicity of essential oils of Aloysia triphylla (L'Hér.) Britton, Lippia gracilis Schauer, and Piper aduncum L. in Colossoma macropomum (Cuvier, 1818).
Provedor de dados: 119
Autores: SANTOS, P. R.; ANDRADE-PORTO, S. M.; OLIVEIRA, M. I. B.; BRANDÃO, F. R.; MATOS, L. V.; VELÁSQUEZ, J. G. R.; FARIAS, C. F. S.; CARPIO, K. C. R.; CHAVES, F. C. M.; CHAGAS, E. C.
Abstract: The aim of this study was to determine the acute toxicity of the essential oils (EOs) of Aloysia triphylla, Lippia gracilis and Piper aduncum in juvenile tambaqui (Colossoma macropomum), and evaluate the possible histopathological alterations in their gills. Resumo: O objetivo deste estudo foi determinar a toxicidade aguda dos óleos essenciais (OEs) de Aloysia triphylla, Lippia gracilis e Piper aduncum em juvenis de tambaqui (Colossoma macropomum), e avaliar as possíveis alterações histopatológicas em suas brânquias.
Tipo: Artigo de periódico
Palavras-chave: Lethal concentration; Natural products; Produtos naturais; Tambaqui; Colossoma Macropomum; Óleo Essencial; Histologia; Histology.
Ano: 2023
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1157825

Análise histológica do grão de pólen do jenipapeiro.
Provedor de dados: 119
Autores: FREIRE, g. DA s.; MACHADO, C. de A.; SILVA, A. V. C. da; LEDO, A. da S.
Tipo: Resumo em anais e proceedings
Palavras-chave: Jenipapo; Fruta Tropical; Histologia Vegetal; Genética Vegetal; Tropical and subtropical fruits; Histology; Plant genetics.
Ano: 2023
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1160030

Oocyte development in pirarucu Arapaima gigas (Schinz, 1822).
Provedor de dados: 119
Autores: TORATI, L. S.; KIRSCHNIK, L. N. G.; LIMA, A. F.; MIGAUD, H.
This work aimed to describe the oocyte development in pirarucu, Arapaima gigas, from primary growth to ovulation stages for the first time.
Tipo: Anais e Proceedings de eventos
Palavras-chave: Peixe; Pirarucu; Reprodução; Histologia Animal; Fish; Arapaima gigas; Histology; Reproduction; Oocytes.
Ano: 2021
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134955

The role of BAP in somatic embriogenesis induction from seed explants of Arachis species from Sections Erectoides and Procumbentes.
Provedor de dados: 119
Autores: PACHECO, G.; GAGLIARDI, R. F.; CARNEIRO, L. A.; CALLADO, C. H.; VALLS, J. F. M.; MANSUR, E.
Tipo: Separatas
Palavras-chave: Groundnut; Somati embriogenesis; Microprogagação; Erectoides; Procumbentes; Amendoim; Histologia; Arachis; Histology; Micropropagation.
Ano: 2007
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/189262

Cryopreservation of Coffea arabica L. zygotic embryos by vitrification.
Provedor de dados: 119
Autores: FREITAS, R. T. da; PAIVA, R.; SALES, T. S.; SILVA, D. P. C. da; REIS, M. V. dos; SOUZA, A. C. de; ROSA, S. D. V. F. da.
As a consequence of the difficulty in conventional coffee seed storage, biotechnological alternatives such as cryopreservation have been investigated. The objective of this study was to develop a protocol for the cryopreservation of Coffea arabica L. (cv. ?Catuaí Vermelho? - IAC 144) zygotic embryos by vitrification. For the cryopreservation study, the embryos were immersed in Plant Vitrification Solution 2 at different times (0, 10, 25, 50, 100, and 250 min) and two temperatures (0 and 25 °C). Subsequently, the best thawing time was determined in a water bath (1, 3, 5 minutes or directly in Recovery Solution). An anatomical study was conducted on non-stored and stored embryos, with or without the use of Plant Vitrification Solution 2. The immersion in...
Tipo: Artigo de periódico
Palavras-chave: Liquid nitrogen; PVS2; TTC test; Ex situ conservation; Histology; Thawing.
Ano: 2016
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065188

Dynamics of thermolysis and skin microstructure in water buffaloes reared in humid tropical climate: a microscopic and thermographic study.
Provedor de dados: 119
Autores: VILELA, R. A.; LOURENÇO JUNIOR, J. DE B.; JACINTO, M. A. C.; BARBOSA, A. V. C.; PANTOJA, M. H. DE A.; OLIVEIRA, C. M. C.; GARCIA, A. R.
The thermolytic capacity test is used to assess the adaptability of animals to existing environmental conditions. However, there is insufficient information on the relationship between histomorphometry and adaptability of buffaloes. Thus, this study aimed to assess the use of thermolysis pathways by buffaloes reared in a hot and humid environment so as to understand the relationships between environment, skin morphological characteristics, and heat storage, as well as the intensity and proportionality of use of its ways of dissipating heat to maintain homeothermy. The heat tolerance test, associated with the evaluations via infrared thermography, was applied to 10 female Murrah buffaloes and tegument histomorphometry was carried out. The animals exhibited...
Tipo: Artigo de periódico
Palavras-chave: Acclimatization; Infrared thermography; Precision livestock farming; Bubalus Bubalis; Heat stress; Histology; Thermoregulation.
Ano: 2022
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145185

HISTOLOGICAL DESCRIPTION OF THE REPRODUCTIVE SYSTEM OF MALE AND FEMALE HATCHLINGS OF THE MAGDALENA RIVER TURTLE (Podocnemis lewyana)
Provedor de dados: 37
Autores: SÁNCHEZ-OSPINA,ANDRÉS C; RODRIGUEZ,BERARDO; CEBALLOS,CLAUDIA P.
In this study we described the macroscopic and microscopic histology of the reproductive system of male and female Podocnemis lewyana neonates (3.5 months old). We found macroscopic differences in the morphology of the gonads between the sexes, with ovaries being twice as long as testes, and testes being twice as wide as ovaries. Microscopically, we identified several immature elements, such as the lack of a muscle layer in the oviduct of females, and simple epithelia instead of pseudostratified epithelia in the oviduct and epididymis described in reptile adults. We also found a black pigment observed macroscopically in the mesovarium, and macroscopically and histologically in the epididymis. This pigment is consistent with the center of melano-macrophages...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epididymis; Histology; Ovary; Oviduct; Pigment; Testis.
Ano: 2014
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2014000300009

POLYPHENOLS DISTRIBUTION AND RESERVE SUBSTANCES ANALYSIS IN CACAO SOMATIC EMBRYOGENESIS
Provedor de dados: 37
Autores: GALLEGO RÚA,Adriana María; HENAO RAMÍREZ,Ana María; URREA TRUJILLO,Aura Inés; ATEHORTÚA GARCÉS,Lucía.
In order to understand the causes of lack of regeneration in cacao somatic embryos, two cacao varieties with different responses to regeneration potential were described based on their capacity to store different compounds. It is well known that seed reserves play a central role in the regenerative capability of somatic embryos; thus, we followed histochemical changes and reserve fluctuations of proteins, polysaccharides and polyphenols during somatic embryogenesis (SE) in the two cacao varieties. The study showed that, in somatic embryos of the regenerating variety, polyphenols were localized mainly in the periphery of the embryo (epidermal cells) and proteins were the main storage substance in the embryo expression medium, while the non-regenerating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; Histology; Reserve accumulation; Recalcitrance; Somatic embryogenesis.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000200002

Somatic embryogenesis in Acrocomia aculeata Jacq. (Lodd.) ex Mart using the thin cell layer technique
Provedor de dados: 39
Autores: Padilha,João Henrique Delfrate; Ribas,Luciana Lopes Fortes; Amano,Érika; Quoirin,Marguerite.
Considering the necessity of Acrocomia aculeata propagation for large-scale production, the aim of this study was to establish a somatic embryogenesis protocol using the thin cell layer (TCL) technique. Aerial parts of in vitro plants were transversally cut at the base into eight TCLs and placed in a culture medium for callus induction. The induction medium was composed of Y3 salts and Morel´s vitamins and supplemented with 150, 300 or 600 μM picloram. After 12 weeks the calli were transferred to a medium supplemented with BAP or 2-iP (12.5 or 25 μM). After 18 weeks, the somatic embryo clusters were transferred to a conversion medium (plant growth regulator-free medium). Primary callus induction rate was higher in the first three TCLs and in media...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2-iP; Callus induction; Histology; Macaw palm; Picloram.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400516

How to construct and use a simple device to prevent the formation of precipitates when using Sudan Black B for histology
Provedor de dados: 39
Autores: Oliveira,João Marcelo Santos de.
The present work aims to demonstrate the stages of fabrication and use of a simple device to avoid the formation or fixation of precipitates from Sudan Black B solution on tissues. The device consists of four coverslip fragments attached to a histology slide, which serve as points of support for the histological slide under analysis. To work properly, the histology slide with the sections should be placed with the sections facing downwards the device. A small space between the device and the histology slide is thereby created by the height of the coverslip fragments. When Sudan Black B is applied, the solution is maintained within the edges of the device and evaporation is minimized by the small space, thereby reducing the consequent formation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histochemical tests; Histology; Lipids; Plant anatomy; Sudan Black B.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400489

In Vitro Propagation of Heliconia bihai (L.) L. from Zygotic Embryos
Provedor de dados: 39
Autores: Ulisses,Cláudia; Melo-de-Pinna,Gladys Flávia; Willadino,Lilia; Albuquerque,Cynthia Cavalcanti de; Camara,Terezinha Rangel.
The internal morphology of embryos from immature and mature fruits of Heliconia bihai (L.) L. cv. Lobster Claw Two was examined. Embryos were inoculated into MS media (full MS and ½ MS) and GA3 (0, 2.5 and 5 mg L-1) with either sucrose or glucose. These plantlets were then replicated and transferred to MS medium (full MS or ½ MS) with 0 or 2.5 mg L-1 BAP and their multiplication was evaluated 30 and 45 days after inoculation. The genetic variability of the multiplied plants was estimated using isoenzyme analyses. The internal morphology of the mature embryos revealed their tissues to be in more advanced stages of differentiation than immature embryos. In the conversion phase, 85% of the inoculated embryos developed into plants in the ½ MS medium with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrates; Embryo culture; Histology; Isoenzymes; Micropropagation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100018

Morpho-anatomical characterization of embryogenic calluses from immature zygotic embryo of peach palm during somatic embryogenesis - DOI: 10.4025/actasciagron.v32i2.3248
Provedor de dados: 1
Autores: Maciel, Simone Alencar; Universidade Federal do Acre; Fermino Junior, Paulo Cesar Poeta; Universidade Federal do Acre; Silva, Ricardo Alexandre; Universidade Estadual do Norte Fluminense Darcy Ribeiro; Scherwinski-Pereira, Jonny Everson; Embrapa Recursos Genéticos e Biotecnologia.
The objective of this study was to morpho-anatomically characterize nodular embryogenic calluses from zygotic embryos of peach palm during the induction of somatic embryogenesis. Immature zygotic embryos were pre-treated in MS medium added to Picloram and 2,4-D (25 &amp;micro;M) and BAP (0, 5, 10 &amp;micro;M). After three months, primary calluses were transferred to MS induction medium added to Picloram and 2,4-D (450 &amp;micro;M). After six months, the embryogenic calluses were then histologically analyzed and cultivated in the maturation medium. The competent tissues of the zygotic embryos differentiated embryogenic calluses under action of both Picloram and 2,4-D auxins (450 &amp;micro;M), where the presence of multi-granular structures were observed....
Palavras-chave: Bactris gasipaes; Micropropagation; Histology; Morphology; Callus anatomy; Somatic embryos 5.00.00.00-4 Bactris gasipaes; Micropropagation; Histology; Morphology; Callus anatomy; Somatic embryos Ciências Agrárias.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3248

Digestible methionine levels for white-egg layer pullets from 7 to 12 weeks of age
Provedor de dados: 2
Autores: Figueiredo Júnior, Jalceyr Pessoa; Costa, Fernando Guilherme Perazzo; Guerra,  Ricardo Romão; Santana, Marcelo Helder Medeiros; Lima, Matheus Ramalho de; Pinheiro, Sarah Gomes.
An experiment was carried out to evaluate the requirement of digestible methionine for growing pullets at growth phase (7 to 12 weeks of age). A completely randomized design was distributed in five treatments, six replicates, and 15 pullets per experimental unit. 450 Dekalb White pullets from the 7th weeks of age, with an average initial weight of 313.14 ± 12.49 g were used. Dietary treatments consisted in five diets supplemented with DL-Methionine which resulted in five levels of digestible methionine (0.266, 0.294, 0.322, 0.350, and 0.378 %). Performance, serological blood, histopathology and histomorphometry data were evaluated. Quadratic responses were observed for final live weight (p &amp;lt; 0.0143), weight gain (p &amp;lt; 0.0073), feed conversion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enzymatic profile Essential amino acid Histology Morphometry. enzymatic profile; Essential amino acid; Histology; Morphometry.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47222

Biochemical and cellularchanges in Oreochromis niloticus related to the water pollution of a degraded river - doi: 10.4025/actascibiolsci.v35i3.13207
Provedor de dados: 3
Autores: Cruz, Zilma Maria Almeida; Universidade Vila Velha; Castro, Rodrigo Roque Lesqueves de; Universidade Vila Velha; Canal, Adriana; Azevedo Júnior, Romildo Rocha; Universidade Vila Velha; Silva, Ary Gomes da; Universidade Vila Velha; Ramos, Alessandro; Universidade Vila Velha.
The effects of polluted water at three sites in the Marinho River, Brazil, on Oreochromis niloticus (Nile tilápia) were investigated using histological, hematological and biochemical approaches. Fish exposed to the impacted water demonstrated that histological changes in gills were accompanied by nuclear and micronuclei abnormalities in cells. The activity of liver and plasma biomarkers (alkaline phosphatase (ALP), acid phosphatase (ACP), alanine aminotransferase (ALT), aspartate aminotransferase (AST) and liver glutathione S-transferase (GST)) showed an expressive change due to the. The results were also correlated with the highest levels of Cu+2, Zn+2 and Mn+2 in the water. The data of this study evidenced the importance of using a set of biomarkers to...
Palavras-chave: Aminotransferases; Phosphatases; Glutathione-S-transferase; Histology; Cell abnormality; Tilapia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/13207

Health State, morphological characterization and biometric parameters in the mangrove crab Ucides cordatus Linnaeus, 1763 (Brachyura: Ocypodidae)
Provedor de dados: 3
Autores: Valentim-Neto, Pedro Alexandre; Gesteira, Tereza Cristina Vasconcelos.
The crab Ucides cordatus is an important feature of mangroves in the North and Northeast of Brazil. In 2002 a large mortality was reported on this species in the Jaguaribe River Estuary. In order to investigate the possible causes specimens were collected monthly between May 2002 and December 2003 at five sites: Fortim (E1), Fortim (E2), Cumbe (E3) Aracati (E4) and Guajiru (E5). The mangrove structure and environmental parameters (salinity, pH, temperature and DO) were also evaluated. Water was collected for suspended solids analysis, BOD and nutrient levels. Salinity decreased in the rainy season, with no significant variation of pH and temperature. Dissolved oxygen levels had a mean of 5.7 mg L-1. Suspended solids increased at site E4, with BOD varying...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biometric parameters; Crustacea; Histology; Bioassay.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47430

Morphological and anatomical characterization of the digestive tract of Centropomus parallelus and Centropomus undecimalis - doi: 10.4025/actascibiolsci.v35i4.14352
Provedor de dados: 3
Autores: Machado, Márcia Regina Fragoso; Universidade Nilton Lins; Souza, Helena de Oliveira; Universidade Federal do Rio de Janeiro; Souza, Valderes Lemos de; Fundação Oswaldo Cruz; Azevedo, Alexandre de; Universidade Federal do Rio de Janeiro; Goitein, Roberto; Instituto de Biociências da Univesidade Estadual Paulista (Unesp), Rio Claro – São Paulo; Nobre, André Dias; Universidade Nilton Lins.
Centropomus parallelus and Centropomus undecimalis are the most common species of Centropomidae in Brazil. Some authors attribute their failure to grow under in artificial conditions due to limited knowledge on the morphological and functional development of their digestive system and on nutrition requirements of both species. Current research characterizes histologically and histochemically the digestive tract of Centropomus parallelus and Centropomus undecimalis to provide a histophysiological assessment for studies related to their nutritional needs. In the esophagus, the mucous cells in the epithelium stained positively for PAS and AB. In the stomach, positive reactions to PAS and negative to AB respectively occurred on surface and mucous cells in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestive tract; Feeding habits; Histology; Centropomus.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14352

Histological and immunohistochemical study of the thyroid gland of the broad-snouted caiman (Caiman latirostris) - doi: 10.4025/actascibiolsci.v35i4.18444
Provedor de dados: 3
Autores: Machado-Santos, Clarice; Universidade Federal da Bahia.; Teixeira, Monalisa Jales; Médica Veterinária Autônoma; Sales, Armando; Universidade Federal Rural do Rio de Janeiro; Abidu-Figueiredo, Marcelo; Universidade Federal Rural do Rio de Janeiro.
The broad-snouted caiman, Caiman latirostris, is widely distributed in countries of South America. In Brazil it is considered an endangered species because of natural habitat destruction and illegal hunting.  In reptiles, the thyroid gland plays an integral part in ecdysis, reproduction, tail regeneration, growth, endocrine function and metabolism rate. The aim of the present study was to characterize the thyroid gland morphology of C. latirostris, based on histochemical and immunohistochemical techniques. The thyroid glands were fixed in Bouin's fluid and serial cross sections were stained with hematoxylin-eosin, Mallory’s trichrome, periodic acid-Schiff (PAS) and Alcian blue (AB pH 1.5 and 2.5). The immunohistochemical technique for 5-HT-IR cells was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências biológicas Thyroid; Histology; Reptiles; 5-HT Histologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/18444

Atrazine and nicosulfuron affect the reproductive fitness of the predator Podisus nigrispinus (Hemiptera: Pentatomidae)
Provedor de dados: 42
Autores: REIS,TATIANE C.; SOARES,MARCUS A.; SANTOS,JOSÉ B. DOS; SANTOS,CONCEIÇÃO A. DOS; SERRÃO,JOSE EDUARDO; ZANUNCIO,JOSÉ C.; FERREIRA,EVANDER A.
Abstract Herbicides can impact non-target metabolic pathways in natural enemies and lead to the reduction of these populations in the field. Behavioral characteristics, morphology and histology of reproductive structures and reproduction of females of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) were evaluated under the effect of the herbicides atrazine, nicosulfuron and the mixture of both. The number of mature oocytes per ovary was lower in females exposed to the herbicides atrazine, nicosulfuron and the mixture of both. Herbicides did not affect the longevity and mortality of P. nigrispinus, therefore, they are selective for this predator. On the other hand, herbicides can cause sublethal effects by affecting the reproduction of predators.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Histology; Morphology; Reproduction; Herbicides.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703625

Reproductive morphology of female Guiana dolphins (Sotalia guianensis)
Provedor de dados: 42
Autores: BECEGATO,ESTELLA Z.; ANDRADE,JANAINA P.; GUIMARÃES,JULIANA P.; VERGARA-PARENTE,JOCIERY E.; MIGLINO,MARIA ANGELICA; SILVA,FERNANDA M. DE OLIVEIRA E.
The reproductive morphology of cetaceans is poorly studied and, despite the large number of strandings, reports on this subject are scarce due to access to carcasses mostly in an advanced state of decomposition. The present study aimed to describe histological characteristics of the female genital tract ofSotalia guianensis, in order to assist in future studies on the reproductive biology of these animals. Females of different ages, from stranding events on beaches in northeastern Brazil, were used. Fragments of all organs were collected and processed for light and scanning electron microscopy. Histological analyses showed that these structures were similar to those found in terrestrial mammals, with some peculiarities, such as the presence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Female genital system; Anatomy; Histology; Guiana dolphin.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401727

Life-long Maternal Cafeteria Diet Promotes Tissue-Specific Morphological Changes in Male Offspring Adult Rats
Provedor de dados: 42
Autores: SANTOS,CAROLYNE D.S.; BALBO,SANDRA L.; GUIMARÃES,ANA T.B.; SAGAE,SARA C.; NEGRETTI,FÁBIO; GRASSIOLLI,SABRINA.
ABSTRACT Here, we evaluated whether the exposure of rats to a cafeteria diet pre- and/or post-weaning, alters histological characteristics in the White Adipose Tissue (WAT), Brown Adipose Tissue (BAT), and liver of adult male offspring. Female Wistar rats were divided into Control (CTL; fed on standard rodent chow) and Cafeteria (CAF; fed with the cafeteria diet throughout life, including pregnancy and lactation). After birth, only male offspring (F1) were maintained and received the CTL or CAF diets; originating four experimental groups: CTL-CTLF1; CTL-CAFF1; CAF-CTLF1; CAF-CAFF1. Data of biometrics, metabolic parameters, liver, BAT and WAT histology were assessed and integrated using the Principal Component Analysis (PCA). According to PCA analysis worse...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Obesity; Dams; Offspring; Histology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602887

Growth and intestinal morphology of juvenile pacu Piaractus mesopotamicus (Holmberg 1887) fed dietary prebiotics (mannanoligosaccharides - MOS)
Provedor de dados: 42
Autores: SADO,RICARDO Y.; BICUDO,ÁLVARO J.A.; CYRINO,JOSÉ E.P.
Intensification of aquaculture production systems exposes fish to numerous stressors, which may negatively affect their growth and limit profitability of aquaculture systems. This study determined effects of increasing levels of dietary mannanoligosaccharides on growth and intestine morphology of pacu. Fish (44.04 g) were randomly distributed into 32 tanks (500 L; 10 fishes per tank) and fed during 63 days with a commercial diet supplemented with 0.0; 0.2; 0.4; 0.6; 0.8; 1.0; 1.5 and 2.0% dietary mannanoligosaccharides. Growth parameters did not differ (P&gt;0.05) between fish fed control diet and mannanoligosaccharide supplemented diets. Intestinal villi perimeter was performed in fish fed control diet, 0.4 and 1.5% dietary mannanoligosaccharides and also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish nutrition; Histology; Piaractus mesopotamicus; Prebiotics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301517

Probiotics protect the intestinal wall of morphological changes caused by malnutrition
Provedor de dados: 42
Autores: AZEVEDO,JORGE F. DE; HERMES-ULIANA,CATCHIA; LIMA,DIRLENE P.; SANT'ANA,DÉBORA M.G.; ALVES,GILBERTO; ARAÚJO,EDUARDO J.A.
This study sought to morphometrically analyze the jejunal wall of protein-malnourished rats administered a probiotic supplement. The sample consisted of recently weaned Wistar rats (Rattus norvegicus) distributed among four groups: animals given a commercial diet (G1, n = 4); animals given the same ration as G1 plus a probiotic supplement (G2, n = 4); animals given a 4% protein diet (G3, n = 4); and animals given the same ration as G3 plus a probiotic supplement (G4, n = 4). After 12 weeks, part of the jejunum was harvested and subjected to routine histological processing. Transverse sections with a thickness of 3 µm were stained with HE, and histochemical techniques were used to assay for glycoconjugates, including staining with periodic acid-Schiff (PAS)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bowel; Digestive system; Histology; Morphometry; Protein-energy malnutrition; Small intestine.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301303

Histological features, starch accumulation and sprouting in the early root development of Jacaranda ulei(Bignoniaceae)
Provedor de dados: 42
Autores: SILVA,PAULO R.D. DA; STEFENON,VALDIR M.
The plant species occurring in the savanna region of the Cerrado biome in Brazil present typical morphological and physiological adaptations to a dry climate with seasonal occurrence of wildfires. In this study, the histological features of the root system, the main sites of synthesis and storage of starch and the initial phases of the bud development were characterized inJacaranda ulei. The anatomical features observed in the root system of J. ulei are related to the needs of the species to survive in the Cerrado. The histochemical analyses demonstrated high synthesis of glucose and glycoprotein after the third day of in vitro culture, in the proximal cells of the cortical parenchyma of the exoderm. Meristematic primordia were observed in the ninth day...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado Biome; Histology; Savanna; Wildfire.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100271

Probiotics prevent growth deficit of colon wall strata of malnourished rats post-lactation
Provedor de dados: 42
Autores: Lima,Dirlene P.; Azevedo,Jorge F. de; Hermes-Uliana,Catchia; Alves,Gilberto; Sant'ana,Débora M.G.; Araújo,Eduardo J.A.
The objective of this study was to analyze morphometrically the colon wall strata of malnourished rats supplemented with probiotics. Sixteen recently weaned Wistar rats (Rattus norvegicus) were distributed into four groups: animals that received commercial chow (G1, n = 4); animals that received the same feed as G1 and were supplemented with probiotics (G2, n = 4); animals that received chow with 4% of proteins (G3, n = 4); animals that received the same feed as G3 and were supplemented with probiotics (G4, n = 4). After 12 weeks, the proximal colon was collected and submitted to histological processing. Three-µm cuts were stained with H.E., Periodic Acid Schifff (P.A.S.) + diasthasis solution and Alcian Blue (A.B.) pH 2.5 and pH 1.0. The morphometric...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Large intestine; Malnourishment; Morphometry; Probiotics.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300015

Osteoderm microstructure of Riostegotherium yanei, the oldest Xenarthra
Provedor de dados: 42
Autores: BERGQVIST,LÍLIAN P.; PEREIRA,PAULO VICTOR LUIZ G.C.; MACHADO,ALESSANDRA S.; CASTRO,MARIELA C. DE; MELKI,LUIZA B.; LOPES,RICARDO T.
﻿Abstract: Riostegotherium yanei from the Itaboraí Basin, Brazil, is the oldest known Xenarthra. This paper aims to describe the internal morphology of the osteoderms of Riostegotherium yanei from the perspective of histology and micro-CT approaches, expanding the available data on cingulate osteoderm microstructure. Seven osteoderms of R. yanei were used for the internal microstructure description and eight of Dasypus novemcinctus for comparison. The osteoderms of Riostegotherium yanei lacks the diploë-like structure typical of glyptodonts but has a three-layered structure composed of two layers of non-Haversian compact bone enclosing a central layer of primary and secondary osteons. This internal organization is distinct from other Astegotheriini of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Itaboraí basin; Paleogene; Dasypodidae; Histology; 3D.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400518

Evaluation of ovarian structures using computerized microtomography
Provedor de dados: 42
Autores: PAULINI,FERNANDA; CHAVES,SACHA B.; RÔLO,JOSÉ LUIZ J.P.; AZEVEDO,RICARDO B. DE; LUCCI,CAROLINA M.
ABSTRACT Visualization and clear understanding of the ovarian structures are important in determining the stage of oestrus, helping to diagnose several pathologies and supporting advances in reproductive technologies. In this research, computerized microtomography (microCT) was used to explore and characterize the ovarian structure of seven mammalian species. Ovaries of rats, female dog, queens, cows, mares, sows and a female donkey were used. After microCT scanning, the same samples were prepared for histologic evaluation, used here as a validation criterion. It was possible to distinguish regions of the cortex and medulla, visualize the morphology and distribution of blood vessels, clearly observe corpus luteum and antral follicles, and visualize oocytes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovarian follicle; Blood vessels; Histology; Tomography; Ovary.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502131

Dermocystidium sp. in the gills of farmed Oreochromis niloticus in Brazil
Provedor de dados: 42
Autores: STECKERT,LILIAN D.; CARDOSO,LUCAS; TANCREDO,KAREN R.; MARTINS,MAURÍCIO L.; JERÔNIMO,GABRIELA T.
Abstract: The genus Dermocystidium is very comprehensive in the host and site of infection, however this is the first report of the occurrence of Dermocystidium sp. in the gills of Nile tilapia. This study was carried out in a fish farming located in the state of Santa Catarina, Brazil. No mortalities were reported in the facility studied and the animals were clinically healthy. During the histopathological analysis of the gills, 8.33% of the fish presented spores of Dermocystidium sp. in the gill tissue. The spores reported herein had a mean length and width of 6.206 x 5.233 μm and a refractile body diameter of 1.965 μm and were studied by histopathology and Transmission Electron Microscopy. This study highlights the importance of a new branchial pathogen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farming; Dermatocystidiosis; Nile tilapia; Histology; Electron microscopy; Spores.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500865

Acute toxicity and histopathology in ornamental fish amazon bluespotted corydora (Corydoras melanistius) exposed to formalin
Provedor de dados: 42
Autores: Santos,Rudã F.B.; Dias,Henrique M.; Fujimoto,Rodrigo Y.
The objective of this work was to evaluate the acute toxicity of formalin and histopathological effects on the Amazon ornamental fish, bluespotted coridora (Corydoras melanistius). A randomized design was used, with ten concentrations of formalin (40%) (0, 3, 6, 12, 25, 50, 100, 150, 200 and 250mg.L-1) with four replicates and five fish per container (3L) in static system for 96 hours. The moribund fish were killed and fixed in 10% formalin to proceed the histopathological analysis of gill, liver and kidney. At the end of this experiment the following mortality rates (%) were obtained in increasing order of exposure: 0, 0, 0, 0, 0, 65, 85, 100, 100 and 100%. The lethal concentration 50% (LC50-96h (I)) estimated was 50.76 mg.L-1 with regression of y =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lethal concentration; Corydora; Formaldehyde; Toxicity; Histology; Amazon.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400014

Exogenous enzyme complex prevents intestinal soybean meal-induced enteritis in Mugil liza (Valenciennes, 1836) juvenile.
Provedor de dados: 42
Autores: RAMOS,LEONARDO R.V.; PEDROSA,VIRGÍNIA F.; MORI,AGNES; ANDRADE,CARLOS F.F. DE; ROMANO,LUIS A.; ABREU,PAULO C.; TESSER,MARCELO B.
ABSTRACT Four soybean meal-based diets containing increasing levels of an enzyme complex (E50, E100, E150 and E200 at 50, 100, 150 and 200 g ton-1, respectively) and one soybean meal-based diet without the enzyme complex (E0) were fed in triplicate to M. liza juveniles in a semi-static flow system with 20 fish per tank for 75 days. There were no differences between the treatments for animal performance parameters, but fish fed the enzyme complex treatment exhibited significantly (P&lt;0.05) higher values of calcium bone retention compared with control fish. Although there was no relationship between bacterial counts in different sections of the gastrointestinal tract or enzyme levels, filamentous bacteria were increased in E50 compared with E150. All of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrase; Growth; Histology; Microorganisms; Mullet; Phytase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100341

Morphological alterations in salivary glands of mice (Mus musculus) submitted to tannin enriched diets: comparison with sialotrophic effects of sympathetic agonists stimulation
Provedor de dados: 45
Autores: Lamy,E.; Baptista,E.S.; Coelho,A.V.; Silva,F. Capela e.
In order to study the effects of tannins at histomorphological level, mice were either fed with three structurally different types of tannins (tannic acid, chestnut, and quebracho) or treated with isoproterenol, during 10 days. Acini of parotid and submandibular glands increased significantly, being the increase higher for parotid compared to submandibular glands, and higher in the quebracho compared with the other tannin groups. Sublingual acinar size also increased after tannin consumption, by opposition to isoproterenol-treated animals. The results present evidences that the effects produced by tannins are dependent on their structure.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mice; Condensed tannin; Hydrolysable tannin; Isoproterenol; Salivary glands; Histology.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000400012

Comb, cloaca and feet scores and testis morphometry in male broiler breeders at two different ages
Provedor de dados: 45
Autores: Leão,R.A.C.; Castro,F.L.S.; Xavier,P.R.; Vaz,D.P.; Grázia,J.G.V.; Baião,N.C.; Avelar,G.F.; Marques Júnior,A.P.
ABSTRACT In broiler breeder roosters, the weight of the testes is positively associated with daily sperm production and fertility. In birds, the testes are located in the coelomic cavity, not being accessible to reproductive evaluation as mammalian testes. The reproductive evaluation of roosters is based on phenotypic traits. Any changes on testes will be reflected on fertility levels. The aim of this paper was to evaluate the potential of association of phenotypic traits as body weight (BW), comb scores (COS), cloaca scores (CLS) and feet scores (FS) with testicular morphometric parameters in adult Cobb® Mx roosters in two ages (25 and 45 weeks of age). The low BW roosters had lower testes weight (TW), smaller seminiferous tubule diameter (STD) and lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Testicular regression; Rooster; Histomorphometry; Phenotypic characteristics; Histology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000601529

Histomorphometric analysis of gonads of green turtles (chelonia mydas) stranded on the coast of Espírito Santo state, Brazil
Provedor de dados: 45
Autores: Failla,G.; Calais Júnior,A.; Pavanelli,L.; Nunes,L.C.
ABSTRACT Studies on reproduction in sea turtles are important due to its life cycle, migratory patterns, high juvenile mortality and environmental impacts. This study aimed to analyse histomorphometrically gonads of C. mydas from the coastline of the Espírito Santo State, Brazil. Ovaries and testicles were collected between 2014 and 2015 from stranded animals. The material was fixed in formalin 10%, assessed macroscopically and processed for histomorphometrical evaluation. Gonads from 34 individuals were evaluated, twenty-four females and ten males. Macroscopic sexual identification presented 100% accuracy confirmed by histology. Sexual dimorphism was observed in one individual, which was considered as adult (CCL=1.023 m). Microscopy of female gonads...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Follicular development; Testis development; Histology; Ovary; Testicle.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100213

Reproductive dynamics of Leporinus obtusidens captured downstream from an important hydropower Station in Brazil
Provedor de dados: 45
Autores: Andrade,E.S.; Felizardo,V.O.; Murgas,L.D.S.; Drumond,M.M.; Zangerônimo,M.G.; Costa,S.F.
This study evaluated the reproductive dynamics and gonadal morphology of piaparas (Leporinus obtusidens) captured downstream from the Funil Hydroelectric Power Station. The 107 piaparas evaluated were captured monthly from Sep 2006 to Aug 2007. The data were stratified among the seasons to evaluate gonad maturation and the reproductive period was determined by assessing the gonadosomatic index, hepatosomatic index, abdominal fat index (AFI), weight:length ratio, condition factor and sexual proportion. The reproductive period lasted from winter to summer (Jul-Mar) in females and from spring to autumn (Sept-Jun) in males. AFI was high during and after the reproductive period in females and only during the reproductive period in males. The highest HIS values...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Reproduction; Piracema; Histology; Gonad.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000500021

Morphometric and quantitative characterization of atrial ganglion neurons from the intercaval region in dogs with dilated cardiomyopathy
Provedor de dados: 45
Autores: Camacho,A.A.; Oliveira-Alves,R.; Klein,R.P.; Sousa,M.G.
The quantity, morphometry, and quality of atrial neurons from the intercaval region in dogs with dilated cardiomyopathy (DCM) were evaluated. Dogs with DCM had greater ganglion neurons than control dogs. The histologic evaluation of the ventricular myocardium and ganglion neurons confirmed DCM and showed the degeneration of ganglion neurons. Dogs with chronic DCM had a secondary cardioneuropathy owing to impaired parasympathetic neural control.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Cardiomyopathy; Histology; Morphometry.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000600007

Occurrence and significance of ovarian and follicular regression in cachara Pseudoplatystoma fasciatum (Linnaeus, 1766): a histology approach
Provedor de dados: 45
Autores: Leonardo,A.F.G.; Romagosa,E.; Batlouni,S.R.; Borella,M.I.
The processes of ovarian regression and follicular atresia which reproduction was not induced by hormone in confined cachara, Pseudoplatystoma fasciatum, were investigated. The macro and microscopic characteristics (oocytes diameter and histology) of the ovaries were described every 20 days, in four stages: initial regression (Rg I = first 20 days), intermediate regression (Rg II = from 21st to 40th day), final regression (Rg III = from 41st to 80th day) and the recovering stage, called resting II (R II = from 81st to 150th day). The experiment was conducted from late January (summer - longer days) to May (autumn - shorter days). In the beginning, A0 samples showed oocyte diameters ranging from 437.5 to 1,187.5mm, suggesting that oocytes were in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cachara; Pseudoplatystoma fasciatum; Ovarian regression; Atretic follicle; Histology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000500019

Morphological and histochemical study of the masseter muscle after occlusal alteration
Provedor de dados: 47
Autores: Mardegan Issa,João Paulo; Tiossi,Rodrigo; Mizusaki Iyomasa,Mamie.
The aim of this study was to evaluate alterations in the masseter muscle of 30 male guinea-pigs submitted to occlusal alteration. The animals were divided into 2 equal groups, the control group (C) only submitted to surgical stress, and the occlusal altered group (T) submitted to teeth extraction. Each group was subdivided into 3 groups, with 5 animals, for the following studies: macroscopy and vessels distribution, light microscopy and histochemical analysis, with animals' perfusion 2 months after surgery. Data were submitted to statistical analysis. Macroscopically, an anteroposterior orientation of the muscular fibers was found and statistical difference between C and T groups in width (p&lt;0.05). Microscopically, C and T groups showed polygonal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Masseter muscle; Morphology; Histology; Histochemistry.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000300003

Effect of morphological heterogeneity of somatic embryos of Melia azedarach on conversion into plants
Provedor de dados: 47
Autores: Vila,Silvia; Gonzalez,Ana; Rey,Hebe; Mroginski,Luis.
Embryogenic cultures were initiated from immature Melia azedarach (Meliaceae) zigotic embryos. Explants were induced on Murashige and Skoog (1962) medium with 4.54 &amp;#956;M thidiazuron or 0.45 &amp;#956;M dichlorophenoxyacetic acid. After 6 weeks of culture on induction medium, somatic embryos were categorized in four morphological classes based on the presence of single or fused embryos and if they remained united or not to the original explant; that were evaluated histologically. The somatic embryos of every category were transferred, in groups or individually, on a 1/4 MS medium. Bipolar embryos, the more typically normal ones, had well defined shoot and root apical meristems and produced single plants; subcultured individually their conversion was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Somatic embryo morphology; Conversion; Histology; Scanning electron microscopy.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452010000100002

Morphology and histology of P. argentinus (Crustacea, Decapoda, Caridea) digestive tract
Provedor de dados: 47
Autores: Sousa,Liliana; Petriella,Ana María.
This work describes the morphology and histology of the P. argentinus digestive tract. The foregut comprises the mouth, oesophagus, and stomach and is lined by a simple cylindrical epithelium overlain by cuticle. There are tegumental glands in the oral region and in the first portion of the oesophagus and of the hindgut. The cardiac stomach is an oval dorsal sac in the cephalothorax and has no calcified structures. The pyloric stomach comprises an upper chamber and a lower gland filter. The filter consists of an outer row of elongated setae and an inner row of dorsally curved setae forming longitudinal channels 16-18µm wide. The midgut runs from the dorsal chamber of the pyloric stomach to the sixth abdominal somite without caeca. The hindgut runs from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacea; Caridea; Morphology; Histology; Digestive tract.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000200004

The effects of 4-nonylphenol contamination on livers of Tilapia fish (Oreochromus spilurs) in Jeddah
Provedor de dados: 48
Autores: Abdulla Bin-Dohaish,El-jawaher.
Alkylphenol polyethoxylates is a group of estrogenic compounds. Natural or synthetic types of these compounds react with the endocrine system by binding hormone receptors, resulting in interference with their action, which is why they are called endocrine disrupting chemicals. Among their hydrolytic products are nonylphenols (NP), which are considered pollutants of aquatic environments. The objective of this study was to evaluate the pathological alterations on liver tissue of fish exposed to these compounds for long durations, starting from beginning of life and during the period of sexual maturity. Tilapia fish were obtained from Abhur fish farms, reared in the laboratory in special basins, and divided into two groups. The first maternal group was...
Tipo: Journal article
Palavras-chave: Nonylphenol; Tilapia fish; Liver; Histology.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000100002

Acute oral toxicity and anti-inflammatory activity of hydroalcoholic extract from Lampaya medicinalis Phil in rats
Provedor de dados: 48
Autores: Morales,Glauco; Paredes,Adrián; Olivares,Alberto; Bravo,Jaime.
BACKGROUND: Algesia and inflammation are related with several pathological conditions. It is known that many drugs available for the treatment of these problems cause unwanted side effects. This study was aimed at evaluating acute toxicity and anti-inflammatory activity of Lampaya medicinalis Phil. (Verbenaceae) widely used in the folk medicine of Northern Chile against rheumatism, arthritis and body joints pain. RESULTS: Oral administration of hydroalcoholic extract (HAE) at the highest dose of 3000 mg/ Kg body weight resulted in no mortalities or evidence of significant behavioral changes. Histological examination revealed normal architecture and no significant adverse effects were observed on the liver, kidney, heart, lung or ovaries and testicles. The...
Tipo: Journal article
Palavras-chave: Lampaya medicinalis; Hydroalcoholic extract; Acute oral toxicity; Histology; Hematology; Anti-inflammatory; Carrageenan.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100006

MICROANATOMY OF THE DIGESTIVE SYSTEM OF ENTEROCTOPUS MEGALOCYATHUS (CEPHALOPODA, OCTOPODA) OF THE SOUTHWEST ATLANTIC
Provedor de dados: 50
Autores: Griselda Garri,Rosana; Lauria de Cidre,Lilia.
A detailed description of the microanatomy of the digestive system of Enteroctopus megalocyathus is given, and this revealed some differences between this octopod species and other species of Octopodidae previously described. These differences are mainly related to tissues lining the lumen of digestive organs. Unlike descriptions in some octopods mucosa, in E. megalocyathus a pseudostratified epithelium is found covering the lumen of oesophagus, crop, stomach, intestine and caecum. Another major finding is that in the posterior salivary glands, two cell types are present in the same tubular adenomere; they do not constitute independent glandular tubules with only one type of glandular cells. The tubules of these glands are lined by two distinct epithelial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Digestive organs; Cephalopods; Southwest Atlantic; Enteroctopus megalocyathus.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612013000200003

Morphology of the male gonads of the spiny lobster Panulirus laevicauda (Latreille, 1817)
Provedor de dados: 52
Autores: Lima,Ana Valêsca Pinto de; Gesteira,Tereza Cristina Vasconcelos.
The present study represented a contribution to the knowledge of the cytological and histological aspects of decapods' reproductive system, describing male germ cells of the spiny lobster Panulirus laevicauda. Seventy-one specimens of different sizes were caught off Fortaleza (Ceará, Brazil). Their testes were removed and fixed in Bouin solution, then, after 24 hours, dehydrated, cleared and embedded in the paraffin. Sections (4 µm thick) were stained with hematoxylin-eosin. The testes appeared macroscopically as a pair of long and highly convoluted tubes joined by a transversal commissure giving the organ an H-like shape. Microscopically, supporting cells and germ cells (spermatogonia I and II, spermatocytes, spermatids and spermatozoa) were seen in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Male reproductive system; Spiny lobster; Panulirus laevicauda.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400008

Functional cytology of the hepatopancreas of Palaemonetes argentinus (Crustacea, Decapoda, Caridea) under osmotic stress
Provedor de dados: 52
Autores: Díaz,Ana Cristina; Sousa,Liliana Graciela; Petriella,Ana María.
The present work describes the effect of different salinities on the functional morphology of the P. argentinus hepatopancreas and analyses the tissue recovery after re-acclimation to freshwater. Adult prawns of both sexes at sexual rest were collected from a tributary of the Mar Chiquita coastal lagoon. The prawns were acclimated in aquaria to four salinity conditions: 0 (control), 8, 16 and 24‰. To evaluate the possible tissular recovery, after 60 days individuals from all the treatments were gradually acclimated to freshwater and maintained for other 30 days. Hepatopancreas samples were processed at the beginning of the trial and every 30 days using standard histological techniques for OM and TEM. The individuals from all the treatments, except the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Histology; Hepatopancreas; P. argentinus.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300013

Somatic embryogenesis and plant regeneration from callus cultures of Cleome rosea Vahl
Provedor de dados: 52
Autores: Simões,Claudia; Albarello,Norma; Callado,Cátia Henriques; Castro,Tatiana Carvalho de; Mansur,Elisabeth.
This paper describes a protocol for the efficient vegetative propagation of Cleome rosea by somatic embryogenesis. Leaf and stem explants from nursery-grown seedlings of C. rosea were cultivated on Murashige and Skoog (MS) medium supplemented with indole-3-acetic acid (IAA), a -naphthaleneacetic acid (NAA), 4-amino-3,5,6-trichloropicolinic acid (picloram) or 2,4-dichlorophenoxyacetic acid (2,4-D). Nodular calli were produced from both explant types in the presence of 4.5 and 9.0 µM 2,4-D. Embryo development and maturation were achieved when calli from stem explants were transferred to media containing a ten-fold reduction of 2,4-D concentration initially used (0.45 and 0.90 µM). Leaf-derived calli did not form embryos with the same treatments. The highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Embriogenic callus; Histology; Phytagel; Somatic embryos.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300024

Identification of Primordial Germ Cells: Cytological, Histological and Immunohistochemical Aspects
Provedor de dados: 52
Autores: Yön,Nazan Deniz; Akbulut,Cansu.
Primordial germ cells (PGCs) constitute an embryonic cell type that migrate to gonadal precursors and form the gametes. In many animals, PGCs are set apart from somatic cells early during embryogenesis. These cells migrate to gonadal precursors and then constitute gonads so they are useful models for cell motility studies. They have a highlighted importance for development and reproduction studies. Primordial germ cells have morphological differences from the somatic cells. Structure of these cells can be detected with light and electron microscopy in early development stages. This review describes the morphological, histological, molecular and ultrastructural features of primordial germ cells in different animals and gives an overview for simplified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Primordial germ cells; Ultrastructure; Histology; Morphology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200222

Histological Alterations in Common Carp (Cyprinus carpio Linnaeus, 1758) Gills as Potential Biomarkers for Fungicide Contamination
Provedor de dados: 52
Autores: Stoyanova,Stela; Yancheva,Vesela Slavcheva; Velcheva,Iliana; Uchikova,Ekaterina; Georgieva,Elenka.
ABSTRACTThe present study aimed to investigate the histological alterations in common carp gills caused by a fosetyl-Al and fenamidone based fungicide tested in laboratory conditions at 30, 38 and 50 mg/L concentration. In general, all the tested concentrations activated compensatory-adaptive mechanisms, which caused pathological changes in the fish gills. Results showed different histological alterations in the gill structure, which included lamellar lifting, edema, proliferation of the glandular cells and epithelium, covering the gill filament, fusion and degenerative alterations. Blood circulatory system showed vasodilatation of the secondary lamellae and aneurysms. Overall, there was enhancement of the gill histological changes, which was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Fish; Gills; Pesticides; Contamination; Biomarkers.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500757

Reproductive biology of Oligosarcus argenteus (Gunther, 1864) adult males and description of the gonadal maturation stages
Provedor de dados: 52
Autores: Matt,Sérgio Luis Pinto da; Gomes,Marcos de Lucca Moreira; Andrade,Dálcio Ricardo de.
Oligosarcus argenteus belongs to the Acestrorhynchinae subfamily, being restricted to South America, and found in several Brazilian hydrographic basins, in lotic and lentic environments, where they are able to reproduce. With the purpose of studying the reproductive biology of the males from this species, many morphological parameters were analyzed during a 24 month period, as well as characterizing the different testicular maturation stages. A maturity scale, with three stages (I - Initial Maturing, II - Intermediate Maturing, III - Final Maturing) was proposed for the adult males of Oligosarcus argenteus. The reproductive period was established by the bimonthly frequency of spermatogenesis and by the gonadal maturation stages.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive cycle; Histology; Testis; Oligosarcus argenteus.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100016

Working Optimally with Serial Sections in Glycol Methacrylate Resin
Provedor de dados: 52
Autores: Leitão,Carlos André Espolador.
ABSTRACT The present work presents an optimized form for distributing serial sections in a glycol methacrylate slide set. This consists of filling the first row with sections from each slide, thus proceeding in the same way with the other rows. Therefore each slide will contain sections of three distinct sample segments.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytology; Histology; Historesin; Microscopy; Plant anatomy; Technique.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100416

Early somatic embryogenesis in Heliconia chartacea Lane ex Barreiros cv. Sexy Pink ovary section explants
Provedor de dados: 52
Autores: Ulisses,Cláudia; Camara,Terezinha Rangel; Willadino,Lilia; Albuquerque,Cynthia Cavalcanti de; Brito,Júlio Zoé de.
The present work evaluated the development of embryogenic callus from transversal ovary sections. The experiments were carried out under two experimental regimes using combinations of IAA (0; 5.71; 8.56; 11.42; 14.27μM) and 2,4-D (0; 13.57; 18.10; 22.62μM) or combinations of 2,4-D with BA (0; 4.43; 6.65; 8.87; 11.09μM). Assessments were made of anatomical aspects of the callus and for the presence of embryogenic structures using cytochemical and histological analyses and stereomicroscopic and scanning electronic microscopic observations. Treatments with 2,4-D and IAA produced friable calluses demonstrating cellular acquisition of morphogenetic competence as well as the formation of pro-embryogenic sectors. The expression of embryogenic program could be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callogenesis; Growth regulator; Histology; Scanning electron microscopy.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100002

Fertility Enhancing Potency of Omega-3 Fatty Acids in Male Rats
Provedor de dados: 52
Autores: Nnamonu,Emmanuel Ikechukwu; Mgbenka,Bernard Obialor; Mbegbu,Edmund Chidiebere.
Abstract Cases of some grave side effects of some allopathic medicines used in treatment of infertility has caused a global need for alternatives with minimal or no side effect, hence the demand to evaluate the fertility enhancing potential of omega-3 fatty acids (O3FA) in male rats. This study evaluated the fertility enhancing potential of omega-3 fatty acids (O3FA) in male rats. Seventy-two sexually mature male albino rats 11-13 weeks of age, weighing between 171 - 180 g were assigned into six groups (I - VI) fed graded doses of O3FA. Administration of O3FA lasted twenty-eight days at 48 hour intervals. At the end of the treatment, organosomatic index of testes, testicular and epididymis sperm cells counts and testicular histology were assessed following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Omega-3 fatty acids; Fertility; Histology; Potency; Male rat.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100318

Optical coherence tomography imaging of the basal ganglia: feasibility and brief review
Provedor de dados: 56
Autores: Lopez,W. O. Contreras; Ângelos,J. S.; Martinez,R. C. R.; Takimura,C. K.; Teixeira,M. J.; Lemos Neto,P. A.; Fonoff,E. T.
Optical coherence tomography (OCT) is a promising medical imaging technique that uses light to capture real-time cross-sectional images from biological tissues in micrometer resolution. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in cardiology and ophthalmology. Application of this technology in the brain may enable distinction between white matter and gray matter, and obtainment of detailed images from within the encephalon. We present, herein, the in vivo implementation of OCT imaging in the rat brain striatum. For this, two male 60-day-old rats (Rattus norvegicus, Albinus variation, Wistar) were stereotactically implanted with guide cannulas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Optical coherence tomography (OCT); Basal ganglia; Rat brain; Brain imaging; Histology; Thalamus.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001201156

p53 as a prognostic factor in adrenocortical tumors of adults and children
Provedor de dados: 56
Autores: Sredni,S.T.; Zerbini,M.C.N.; Latorre,M.R.; Alves,V.A.F.
Mutations of the tumor suppressor gene p53 have been considered to be important determinants in several kinds of human cancer. Accumulation of p53 protein has been reported to correlate with more aggressive clinical behavior in some neoplasms. The role of p53 expression in adrenal cortical tumors (ACT) has not been elucidated but some studies have suggested its correlation with malignant behavior. Our objective was to determine if there is a correlation between the expression of immunoreactive p53 and the biological behavior of ACT. Fifty-seven ACT (21 from children and 36 from adults) were evaluated for p53 expression by immunohistochemistry in formalin-fixed paraffin-embedded tissue and analyzed in terms of outcome. The p53 parameter was utilized...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Adrenal cortical tumors; Histology; P53; Immunohistochemistry.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000100004

Experimental model of intervertebral disc degeneration by needle puncture in Wistar rats
Provedor de dados: 56
Autores: Issy,A.C.; Castania,V.; Castania,M.; Salmon,C.E.G.; Nogueira-Barbosa,M.H.; Bel,E. Del; Defino,H.L.A.
Animal models of intervertebral disc degeneration play an important role in clarifying the physiopathological mechanisms and testing novel therapeutic strategies. The objective of the present study is to describe a simple animal model of disc degeneration involving Wistar rats to be used for research studies. Disc degeneration was confirmed and classified by radiography, magnetic resonance and histological evaluation. Adult male Wistar rats were anesthetized and submitted to percutaneous disc puncture with a 20-gauge needle on levels 6-7 and 8-9 of the coccygeal vertebrae. The needle was inserted into the discs guided by fluoroscopy and its tip was positioned crossing the nucleus pulposus up to the contralateral annulus fibrosus, rotated 360° twice, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intervertebral disc degeneration; Animal models; Histology; Wistar rats.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000300235

Effect of sodium carboxymethylcellulose and methylprednisolone on the healing of jejunal anastomoses in rats
Provedor de dados: 56
Autores: Sousa,A.A.; Petroianu,A.; Trapiello Neto,V.; Rios,V.S.; Barbosa,A.J.A.
Sodium carboxymethylcellulose (SCMC) has been effective in reducing adhesion formation and corticosteroids reduce the inflammatory process. The objective of this study was to define the intraperitoneal (ip) effects of SCMC combined with intramuscular (im) methylprednisolone on peritoneal adhesion formation and on jejunal anastomosis healing in rats. Twenty Wistar rats (200-350 g) were divided into four groups (N = 5): groups I and III (controls) 5 and 21 days of treatment before sacrifice, respectively; groups II and IV (experimental groups) 5 and 21 days of treatment, respectively. SCMC (1%) was infused into the abdominal cavity and methylprednisolone (10 mg kg-1 day-1) was injected im daily from the day before surgery for animals of groups II and IV. All...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bowel anastomosis; Peritoneal adhesions; Sodium carboxymethylcellulose; Corticosteroid; Histology; Wound healing.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000400012

Evaluation of diagnostic methods for the detection of Helicobacter pylori in gastric biopsy specimens of dyspeptic patients
Provedor de dados: 58
Autores: Ramis,Ivy Bastos; Moraes,Ernani Pinho de; Fernandes,Márcia Silveira; Mendoza-Sassi,Raul; Rodrigues,Obirajara; Juliano,Carlos Renan Varela; Scaini,Carlos James; Silva,Pedro Eduardo Almeida da.
Helicobacter pylori infects nearly 50% of the world's population. This microorganism is accepted as the most important agent of gastritis and as a risk factor for peptic ulcer disease and gastric adenocarcinoma. Currently many diagnostic methods exist for detecting H. pylori, however they all have limitations, thus it is recommend a combination of at least two methods. The aim of this study was to evaluate diagnostic methods, such as in-house urease test, culture and Polymerase Chain Reaction (PCR), for the detection of the H. pylori in gastric biopsy specimens of 144 dyspeptic patients, using as gold standard the association between histology and rapid urease test. According to the gold standard used in this study, 48 (33.3%) patients were infected with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helicobacter pylori; Histology; Culture; Urease test; Polymerase Chain Reaction.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300008

Anti-diabetic effects of Campomanesia xanthocarpa (Berg) leaf decoction
Provedor de dados: 60
Autores: Vinagre,Anapaula Sommer; Rönnau,Ângela Della'Santa Rubio Origuella; Pereira,Sabrina Francisco; Silveira,Lídia Uliano da; Wiilland,Elenir de Fátima; Suyenaga,Edna Sayuri.
The objective of this research was to identify the effects of 3-week treatment of normal and streptozotocin-induced diabetic rats using a leaf decoction of Campomanesia xanthocarpa Berg. (20 g/L) on physiological, biochemical and histological parameters. Streptozotocin (STZ, 70 mg/kg in citrate buffer, pH 4.5) was administered IP to induce experimental diabetes one week prior to the treatment. STZ caused typical diabetic symptoms: polydypsia, polyuria, polyphagia, hyperglycemia, hypertriglyceridemia and histopathological modifications in the pancreas, liver and kidney. The treatment of diabetic rats using the decoction decreased blood glucose levels, inhibited hepatic glycogen loss, and prevented potential histopathological alterations in the pancreas and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Campomanesia xanthocarpa/pharmacognosy; Diabetes Mellitus/experimental study; Hypoglycemic plant; Histology; Carbohydrate/metabolism; Lipid/metabolism.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000200002

Assessing the use of frozen pork meat in the manufacture of cooked ham
Provedor de dados: 116
Autores: LOS,Francine Gomes Basso; PRESTES,Rosa Cristina; GRANATO,Daniel; SIMÕES,Deise Rosana Silva; ROMAN,Silvane Souza; DEMIATE,Ivo Mottin.
This study aimed to evaluate the effects of slow (–18 °C) and fast freezing (liquid nitrogen) of pork meat, and the use of exudate released upon thawing, on the physicochemical, color, rheological, microbiological, histological, and sensory characteristics of cooked ham. The meat samples were frozen at –18 °C and thawed after 22 weeks for the production of cooked ham. No significant difference was observed regarding physicochemical, color and microbiological parameters or in sensory acceptance. The hardness and chewiness parameters showed significant differences when compared to the control sample (ham made from chilled meat). Light microscopy of cooked ham samples showed that changes in the tissues were caused by freezing and thawing the meat. The effect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Sensory analysis; Texture; Freezing-thawing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000100124

Estudios sobre la morfología y oscurecimiento del pericarpio de frutos de rambután (Nephelium lappaceum Linn.).
Provedor de dados: 32
Autores: Caballero Pérez, Juan Francisco.
El oscurecimiento del pericarpio en frutos de rambután a pocos días después de la cosecha demerita su calidad limitando su comercialización. La producción de rambután a nivel comercial  ha aumentado considerablemente en el sur de México por lo que se ha visto la necesidad de estudiar aspectos de la fisiología del fruto relacionados con la oxidación del pericarpio durante el manejo postcosecha. Las tecnologías postcosecha usadas para reducir el obscurecimiento no han sido efectivas pues tienen beneficios limitados. Por lo anterior, es indispensable conocer el origen del  problema e implementar tecnologías que resulten en mayor vida de anaquel. En este sentido, los objetivos de esta investigación fueron conocer las características morfológicas, anatómicas,...
Palavras-chave: Desarrollo de fruto; Histología; Pericarpio; Estomas; Oscurecimiento; Postcosecha; Fruit development; Histology; Pericarp; Stomata; Browning; Postharvest; Doctorado; Fruticultura.
Ano: 2012
URL: http://hdl.handle.net/10521/775

Estudios sobre la morfología y oscurecimiento del pericarpio de frutos de rambután (Nephelium lappaceum Linn.).
Provedor de dados: 32
Autores: Caballero Pérez, Juan Francisco.
El oscurecimiento del pericarpio en frutos de rambután a pocos días después de la cosecha demerita su calidad limitando su comercialización. La producción de rambután a nivel comercial  ha aumentado considerablemente en el sur de México por lo que se ha visto la necesidad de estudiar aspectos de la fisiología del fruto relacionados con la oxidación del pericarpio durante el manejo postcosecha. Las tecnologías postcosecha usadas para reducir el obscurecimiento no han sido efectivas pues tienen beneficios limitados. Por lo anterior, es indispensable conocer el origen del  problema e implementar tecnologías que resulten en mayor vida de anaquel. En este sentido, los objetivos de esta investigación fueron conocer las características morfológicas, anatómicas,...
Palavras-chave: Desarrollo de fruto; Histología; Pericarpio; Estomas; Oscurecimiento; Postcosecha; Fruit development; Histology; Pericarp; Stomata; Browning; Postharvest; Doctorado; Fruticultura.
Ano: 2012
URL: http://hdl.handle.net/10521/775

Baybean ( Canavalia rosea (Sw.) DC.); organogenesis, morphological and anatomical studies
Provedor de dados: 73
Autores: Mohajer,Sadegh; Taha,Rosna Mat; Mohamed,Normadiha; Razak,Ummi Nur Abdul.
ABSTRACT Morphological and anatomical studies comprised leaf venation, histological analysis and epidermal peeling were carried out on Canavalia rosea (Sw.) DC.). Anatomical studies of the leaf and root determined the presence of cuticle and oil glands, arrangement of cells and the structure of vascular system. The dorsiventral leaf with pinnate venation and amphistomatic leaf with paracytic type stomata were embedded below the epidermis. Trichomes and oil glands were also observed on both adaxial and abaxial surfaces of leaf. Longitudinal sections of the callus showed the existence of meristematic cells, which could give rise to plant regeneration. In the process of organogenesis, adventitious shoots emerged from leaf and stem explants within 2 months...
Tipo: Journal article
Palavras-chave: Leaf architecture; Histology; Hormone; 6-benzyladenine; Trichomes; SEM.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432017000100120

Morphological aspects of cell reabsorption in laying queens and workers of Apis mellifera (Hymenoptera, Apidae)
Provedor de dados: 76
Autores: Patrício,Karina; Cruz-Landim,Carminda da.
The occurrence of cell reabsorption in the ovaries of queens in several rates of laying eggs, artificially impeded of laying, and in nurse workers, of Apis mellifera (Linnaeus, 1758), was studied with light (LM) and transmission electron microscopy (TEM). Two types of structures were described and named by analogy with vertebrates ovarian structures, as corpus luteus, when resulting from the reabsorption of the follicular cells after ovulation, and corpus atresicus when resulting from total follicular reabsorption at any oocyte developmental stage. These structures have the same morphological characteristics and physiological signification in both castes. The corpus luteus occurrence indicates ovulation and its number is correspondent to the queen's rates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteus; Corpus atresicus; Oviposition; Histology; Ultrastructure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400001

Histology of the liver of Oligosarcus jenynsii (Ostariophysi, Characidae) from Los Padres Lake, Argentina
Provedor de dados: 76
Autores: Petcoff,Gladys M.; Díaz,Alcira O.; Escalante,Alicia H.; Goldemberg,Adriana L.
The liver is an organ notable for its sensitivity to a great variety of environmental factors. It is composed of a parenchyma divided into irregular lobules by the exocrine pancreas or hepatopancreas; the pancreatic cells are arranged around a branch of the portal vein. The hepatocytes are radially arranged in cords around a central sinusoid. The liver histomorphology and the organization of exocrine pancreatic tissue of O. jenynsii (Günther, 1864) is similar to the acinar morphology of many teleosts, including freshwater and marine species. The aim of the present work was to carry out the histological analysis of the liver of Oligosarcus jenynsii, one of the most common species inhabiting Los Padres Lake (Buenos Aires Province, Argentina).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Liver; Histology; Characid; Freshwaters.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000200010

Ovarian development and spawning of Macrobrachium amazonicum (Crustacea, Decapoda)
Provedor de dados: 76
Autores: Ventura,Emerson; Winick-Silva,Allysson; Shinozaki-Mendes,Renata A.
ABSTRACT Macrobrachium amazonicum (Heller, 1862) is the most important species for aquaculture native to South America. This study evaluates the phenotypic plasticity of females of Macrobrachium amazonicum with respect to the gonadal development, and determines the spawning type. Our study consisted of macro and microscopic analysis of the reproductive tract. Ovaries exhibited the following reproductive cells in developmental sequence: oogonia (OO) - mean diameter and standard deviation of 25.4 ± 6.5 μm; previtellogenic oocyte (PVO) - 61.7 ± 10.7 μm, vitellogenic oocyte (VO) - 113.9 ± 24.5 μm; and mature oocyte (MO) - 308.7 ± 56.3 μm. Ovaries increased in volume due to vitellogenesis and changing of basophilic to acidophilic composition. Follicular cells,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive biology; Maturation; Clutches of oocytes; Histology; Amazon River prawn.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100226

Histologia del sistema reproductor masculino de Helobdella hyalina (Hirudinea, Glossiphoniidae) en Argentina
Provedor de dados: 76
Autores: Gullo,Betina Sandra.
A detailed preliminary histological analysis of Helobdella hyalina Ringuelet, 1942 male system from Los Talas, Buenos Aires, Argentina is described. Six pairs of testisacs, located between the crop caeca, form the male reproductive system. Each testisac is clothed by the mesotelium. Inside it, the germinal cells are connected to the citophore and develop functional unit called poliplast. The spermatozoa are released into testisacs after the reabsortion of the citophore. Five stages of spermatogenesis are described taking into account the successive maturation stages of germinal cells and the changes in the citophore size. Lining cells and gland cells were found in the seminal vesicle. Five different types of gland cells are placed inside the ejaculatory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Reproductive system; Helobdella.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100002

Morphology and dynamics of male gametogenesis in Sympterygia bonapartii (Chondrichthyes, Rajidae) from Northern Patagonia
Provedor de dados: 76
Autores: Moya,Ana C.; Andrade,María C. Díaz; Galíndez,Elena J.
ABSTRACT The smallnose fanskate, Sympterygia bonapartii Müller &amp; Henle, 1841 is one of the most disembarked items in commercial harbors in Argentina. In this work, the microscopic architecture of mature male gonads and the dynamics of cysts development are analyzed as a contribution to awareness of the reproductive biology of the species. Some biological data related to reproduction are given as well. Two seasons were sampled (fall and spring) and length classes's frequency distribution and maturity stages frequency distribution are given. Size at first sexual maturation for males was estimated at 57 cm of total length. Testes are symmetric, peer, lobed, with several germinal zones. Inside the gonads, there are many spermatocysts, containing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Testis; Smallnose fanskate; Spermatogenesis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000300316

Revaluation of the taxonomic characters and distribution of Omalonyx geayi (Gastropoda, Succineidae)
Provedor de dados: 76
Autores: Arruda,Janine O.; Barker,Gary M.; Thomé,José W.
ABSTRACT Omalonyx geayi Tillier, 1980 was originally described on the basis of specimens from Kaw swamp, French Guiana. This species distinguished from other of Omalonyx d'Orbigny, 1837: (i) by hermaphrodite duct twice as long and sacculate, without radial ducts but a funnel-shaped insertion on the ovariotestis, and (ii) by longitudinal wrinkled folds on the phallus inner wall. Two recent collections - from Trinidad and Carauari (Amazonas, Brazil) included specimens with ovariotestis and hermaphrodite duct morphologies similar to that originally described for O. geayi, but with phallus morphology not consistent with identification as O. geayi. A further eight lots, from Suriname, Ecuador, Brazil (Amazonas and Alagoas States), Bolivia and Cayenne-Kourou...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parasitic castration; Histology; Neotropical; Ovariotestis; Hermaphrodite duct.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100219

Evaluation of the gonad volume throughout magnetic resonance imaging in Crassostrea gigas and comparison with the histological method
Provedor de dados: 5
Autores: Flahauw, Emilie; Davenel, Armel; Quellec, Stéphane; Quillien, Virgile; Degremont, Lionel; Lapegue, Sylvie; Hatt, Philippe-jacques.
Biological parameters of the cupped oyster Crassostrea gigas such as growth, reproductive effort (duration of the gametogenesis, date of spawning, and fecundity) differ widely among oysters in the same location. Furthermore, most of the traditional methods, like histological observations, could lead to large variability on the observations and the measurements ofthese traits, and large uncertainties on their changes over time. These can be drastically reduced by using Magnetic Resonance Imaging (MRI) which is a non invasive method allowing to measure the same individual during its development. Forty oysters were assessed using MRI for the volume of whole soft body, the intra valves space, the adductor muscle, and the gonad, which also include the digestive...
Tipo: Text
Palavras-chave: Molluscs; Crassostrea gigas; Gonad; Histology; MRI.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00107/21784/19370.pdf

Histology, cytogenetics and cytofluorymetry in diagnosis of neoplasia in Macoma balthica (Bivalvia, L.) from the southern Baltic Sea
Provedor de dados: 5
Autores: Katarzyna, S; Renault, Tristan; Wolowicz, M.
This study presents results of histopathologic, cytogenetics and flow cytometry analyses performed on Macoma balthica collected from the Gulf of Gdansk (Baltic Sea) in 2003 in order to compare the techniques for diagnosis of neoplasia. The proportion of affected clams gave a crude prevalence of 15.7 %. The four stages of the disease defined by histology and three stages of neoplasia defined by flow cytometry were reported. Stage I defined by flow cytometry corresponded to stages I and II defined by histology. Chromosome analysis did not lead to a staging of neoplastic progression. Both cytogenetics and flow cytometry indicated a difference in the DNA content of non-neoplastic and neoplastic cells. Cytogenetics examination marked that the range of...
Tipo: Text
Palavras-chave: Baltic Sea; Cytofluorymetry; Cytogenetics; Histology; Macoma balthica; Neoplasia.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-2921.pdf

Influence of lupin and rapeseed meals on the integrity of digestive tract and organs in gilthead seabream (Sparus aurata L.) and goldfish (Carassius auratus L.) juveniles
Provedor de dados: 5
Autores: Omnes, Marie-helene; Silva, Francisco; Moriceau, Jacques; Aguirre, P.; Kaushik, Sadasivam; Gatesoupe, F. J.
Two rearing trials were conducted to evaluate the effects of dietary lupin (LM) and rapeseed (RM) meals in gilthead seabream (Sparus aurata L.) and goldfish (Carassius auratus L.) juveniles. Each plant meal was incorporated at the rate of 200 g kg−1 in two distinct diets, which were compared with a fishmeal-based diet as control. After 1 month, the two plant diets did not influence the whole body growth, but the digestive systems were affected. The splenosomatic index was reduced with two plant meals in goldfish and with RM in seabream. The hepatosomatic index was only reduced in LM-fed seabream. Cellular characteristics were also affected. The largest liver cells were observed in RM-fed goldfish suggesting changes in metabolic function. The LM and RM...
Tipo: Text
Palavras-chave: Digestive tract; Gilthead seabream; Goldfish; Histology; Lupin; Rapeseed.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00190/30107/28742.pdf

Classical and computed tomographic anatomical analyses in a not-so-cryptic Alviniconcha species complex from hydrothermal vents in the SW Pacific
Provedor de dados: 5
Autores: Laming, Sven; Hourdez, Stéphane; Cambon-bonavita, Marie-anne; Pradillon, Florence.
The chemosymbiotic gastropod Alviniconcha (Provannidae), first described in 1988, is one of the most emblematic hydrothermal-vent taxa described from the Central Indian Ridge and the Southwest (SW) Pacific. Symbiotic bacteria found in the gill of Alviniconcha are thought to be their principal source of nutrition. In the SW Pacific, species distributions for A. kojimai, A. boucheti – and to a lesser extent A. strummeri – overlap. While Alviniconcha species do not appear to truly co-exist in these highly energetic but spatially limited habitats, certain species regularly co-occur within a single vent field and in rare instances, the same edifice. Past research suggests that SW-Pacific Alviniconcha species might aggregate around fluids with distinct...
Tipo: Text
Palavras-chave: Deep sea; Chemosymbiotic; Periostracum; Gastropod; Habitat partitioning; Computed tomography; Histology; Taxonomy; 3D model.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74048/73459.pdf

Etude d'un Microorganisme de Type Chlamydien chez la Palourde Ruditapes Decussatus L.
Provedor de dados: 5
The authors study a chlamydial micro-organism parasite of the digestive epithelium of the carpet shell Ruditapes decussatus. The action of this microorganism seems of little import : the intracellular infection is limited to a small number of cells and does not cause any serious lesion in the digestive epithelium.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Digestive system; Lesions; Parasitism; Histology; Microorganisms; Diseases.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1934.pdf

AMP-deaminase in elasmobranch fish: A comparative histochemical and enzymatic study
Provedor de dados: 5
Autores: Thebault, Marie-t; Izem, Lahoucine; Leroy, Jean Paul; Gobin, Eric; Charrier, Gregory; Raffin, Jean-paul.
AMP-deaminase activity was measured in white muscle from a wide range of fish, including one cyclostome, 13 chondrosteans, and one teleost to elucidate the pattern of the AMP-deaminase activity in white muscle of fish. Compared to a mammalian (rat) muscle extract, low enzyme activities are found in the cyclostome and two elasmobranchs from two families (Scyliorhinidae, Hexanchidae). In contrast, higher AMP-deaminase activities, similar to mammals, are expressed in Squalidae, all families of skates, Chimaeridae and in the teleostean fish. We then compared AMP-deaminase activities in red and white muscles from two representative elasmobranch fish, the dogfish (Scyliorhinus canicula) and the thornback ray (Raja clavata). The fibre type composition and...
Tipo: Text
Palavras-chave: White fibres; Red fibres; Muscle; Histology; Fish; Evolution; Elasmobranch; AMP deaminase.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-635.pdf

Fixation d''un anticorps anti-lysozyme dans des cellules de mollusques bivalves
Provedor de dados: 5
Autores: Auffret, Mathieu; Diouris, M; Herry, A.
A polyclonal rabbit anti-human lysozyme (Dako) was applied on histological sections from bivalve mollusc and revealed with a mouse anti-rabbit IgG fluorescein conjugated antibody to localise cellular lysozyme in tissues where its activity had previously detected by enzymatic techniques. Labelling occurred in the cytoplasm of epithelial cells covering the body. This is in agreement with the intracellular distribution of this enzyme. In the Lucinid Lucinella divaricata gills, the cytoplasm of bacteriocytes was also labelled. This suggests that antibacterial activity occurred in these cells. Control sections indicate that fluorescence was a consequence of true primary antibody fixation. However, its specificity should be verified by electrophoretical...
Tipo: Text
Palavras-chave: Bivalvia; Immunology; Antibodies; Electrophoresis; Histology.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1723.pdf

Effects of an environmentally relevant concentration of diuron on oyster genitors during gametogenesis: responses of early molecular and cellular markers and physiological impacts
Provedor de dados: 5
Autores: Akcha, Farida; Barranger, Audrey; Bachere, Evelyne; Berthelin, C. Heude; Piquemal, D.; Alonso, P.; Sallan, R. Rondon; Dimastrogiovanni, G.; Porte, C.; Menard, Dominique; Szczybelski, A.; Benabdelmouna, Abdellah; Auffret, M.; Rouxel, Julien; Burgeot, Thierry.
Genitors of the Pacific oyster Crassostrea gigas were submitted during gametogenesis to a short pulse exposure to the herbicide diuron at a realistic environmental concentration. Histological analysis showed no effect of diuron on gametogenesis course, sex ratio and reproductive effort. A non-significant increase in testosterone and progesterone levels was observed in genitors exposed to the herbicide. At cell level, diuron exposure was shown to modulate the phagocytic activity of circulating hemocytes. The results of a transcriptional analysis showed that diuron affected the expression of genes belonging to functions known to play a major role during oyster gametogenesis such as gene transcription regulation, DNA replication and repair, DNA methylation...
Tipo: Text
Palavras-chave: Oyster; Pesticide; Reproduction; Histology; Gene expression; RT-qPCR; Steroid; Immunity.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00309/41983/83232.pdf

Gonad volume assessment in the oyster Crassostrea gigas: Comparison between a histological method and a Magnetic Resonance Imaging (MRI) method
Provedor de dados: 5
Autores: Flahauw, Emilie; Quellec, Stephane; Davenel, Armel; Degremont, Lionel; Lapegue, Sylvie; Hatt, Philippe-jacques.
Previous studies comparing Crassostrea gigas selected lines with different susceptibility to summer mortality concluded that the higher the reproductive effort the lower the survival. But theywere lacking individual followup of this reproductive effort which would be of great interest to help us to understand the physiology of the oysters facing summermortalities. Themost frequently usedmethod for assessing the volume of the gonad is to measure the area it occupies on histological sections. Gonad measurement by magnetic resonance imaging, in contrast, is non-destructive and therefore makes it possible to assess individual evolution as well as to compare individuals. The present study compared the values of gonad volume by thismethodwith the values of gonad...
Tipo: Text
Palavras-chave: Oyster; Crassostrea gigas; Reproduction; Histology; Magnetic resonance imaging; MRI.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00102/21309/19410.pdf

Recherche sur Marteilia maurini n. sp. parasite de la moule Mytilus galloprovincialis Lmk.
Provedor de dados: 5
Autores: Comps, Michel; Pichot, Yves; Papagianni, Panagiota.
Histological control practiced in 1981 revealed that the mussel Mytilus galloprovincialis is infected by a new parasite Marteilia maurini sp. n. The structure and the cycle of development are described. The particularities of this parasite in the genus Marteilia are given and discussed.
Tipo: Text
Palavras-chave: Marteilia maurini; Mytilus galloprovincialis; New species; Taxonomy; Mussel culture; Histopathology; Histology.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-1895.pdf

Evaluating the histological-based condition of wild collected larval fish: A synthetic approach applied to common sole (Solea solea)
Provedor de dados: 5
Autores: Di Pane, Julien; Gendrot, F.; Giraldo, Carolina; Marchal, Paul; Koubbi, Philippe; Loots, Christophe.
In the present study, the histological-based condition of common sole (Solea solea) larvae in the English Channel was evaluated to assess the relevance of experimentally-calibrated indices for wild collected specimens. Based on topographical observation of foregut, midgut, hindgut, liver and pancreas, each of the 202 larvae analysed was attributed one of the six grades of a condition index that was developed for sole in the nineties. In parallel, a synthetic table of 20 criteria historically used as condition indicators was created from an extensive review of the literature. These criteria were related to tissular integrity, cells height, nuclei, presence of prey and vacuolisation of the same five target organs. For each larva, each criterion was scored on...
Tipo: Text
Palavras-chave: Condition index; Eastern English Channel; Fish larvae; Histology; Solea solea; Starvation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71325/69754.pdf

Histogenese de l'organe Y (glande de mue) chez l'embryon de la crevette Palaemon serratus (Pennant) (crustace decapode Natantia)
Provedor de dados: 5
Autores: Leroux, A.
The Y organ appears during the embryonic development of the prawn (P. serratus ) at a stage approximately C, according to Richard's definition (1974). 3 weeks separate this stage from hatching at a temperature of 20 degree C. The organ formation is realized over 48 hours and is marked by an histological modification and a small mitotic crisis in the epidermal tissue from which it differentiates. Its metameric localization is mainly maxillular.
Tipo: Text
Palavras-chave: Palaemon serratus; Malacostraca; Eggs; Organogenesis; Embryonic development; Histology; Organe Y; Histogenèse; Crevette.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1193.pdf

Dietary phospholipids are more efficient than neutral lipids for long-chain polyunsaturated fatty acid supply in European sea bass Dicentrarchus labrax larval development
Provedor de dados: 5
Autores: Gisbert, Enric; Villeneuve, Laure; Zambonino, Jose-luis; Quazuguel, Patrick; Cahu, Chantal.
We evaluated the effects of dietary lipid class (phospholipid vs. neutral lipid) and level of n-3 long-chain PUFA (LC-PUFA) on the growth, digestive enzymatic activity, and histological organization of the intestine and liver in European sea bass larvae. Fish were fed from the onset of exogenous feeding at 7 to 37 d post-hatch with five isoproteic and isolipidic compound diets with different levels of EPA and DHA. Diet names indicated the percentage of EPA and DHA contained in the phospholipids (PL) and neutral lipids (NL), as follows: PL5, PL3, PL1, NL1, and NL3. Histological observations showed different patterns of lipid absorption and accumulation in the intestinal mucosa depending on the level and nature of the dietary lipid fraction. Fish fed high...
Tipo: Text
Palavras-chave: Histology; Digestive system; Phospholipid; Larvae; Dicentrarchus labrax; Dietary.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-929.pdf

A histological study on the development of the digestive system of Pseudosciaena crocea larvae and juveniles
Provedor de dados: 5
Autores: Mai, Kangsen; Yu, Hairui; Ma, Hongming; Duan, Qingyuan; Gisbert, Enric; Zambonino, Jose-luis; Cahu, Chantal.
The ontogenetic development of the gut and accessory organs in large yellow croaker Pseudosciaena crocea was investigated using light microscopy from hatching up to the juvenile stage (40 days post hatch, dph). At 3 dph (mean +/- S.D., 4.1 +/- 0.1 mm total length, L-T), coinciding with the buccopharynx opening, larvae started to feed exogenously, and the gut consisted of a well-developed buccopharynx, a partially-differentiated oesophagus and an intestine divided in three regions (anterior intestine, intermediate intestine and rectum). Yolk reserves were not completely depleted at the onset of exogenous feeding, and a period of mixed nutrition was observed up to 6 dph (4.3 +/- 0.1 mm L-T) when yolk was definitively exhausted. Important morphological...
Tipo: Text
Palavras-chave: Pseudosciaena crocea; Ontogenetic development; Large yellow croaker; Histology; Digestive system.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-930.pdf

Identifying Robust Proxies of Gonad Maturation for the Protandrous Hermaphrodite     Tridacna maxima     (Röding, 1798, Bivalvia) from Individual to Population Scale
Provedor de dados: 5
Autores: Menoud, Mathilde; Van Wynsberge, Simon; Le Moullac, Gilles; Levy, Peva; Andrefouet, Serge; Remoissenet, Georges; Gaertner-mazouni, Nabila.
Monitoring gonadmaturation for protandrous and functional hermaphrodite species such as the giant clamTridacna maxima is difficult due to the juxtaposition and relative proportion ofmale and female tissues in the gonad [gonadal sex ratio (GSR)]. Here, the relevance of the widely used gonadosomatic index (GSI) as proxy of giant clam gonad maturation is tested with a large dataset (n = 265). Gonadosomatic index is compared with other indices, namely the proportion of the male part harboring spermatozoids, the proportion of empty oocyte follicles, the mean oocyte diameter, and the oocyte elongation. At gonad scale, high index variability highlighted partial spawning. At individual scale, male and female maturation proxies were contrasted, showing either...
Tipo: Text
Palavras-chave: Giant clam; Marine bivalve; Reproduction; Spawn; Tatakoto atoll; Histology; Tridacna maxima.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44441/44111.pdf

Azaspiracid accumulation, detoxification and biotransformation in blue mussels (Mytilus edulis) experimentally fed Azadinium spinosum
Provedor de dados: 5
Autores: Jauffrais, Thierry; Marcaillou-le Baut, Claire; Herrenknecht, Christine; Truquet, Philippe; Sechet, Veronique; Nicolau, Elodie; Tillmann, Urban; Hess, Philipp.
Azadinium spinosum (Elbrächter and Tillmann), a small marine dinoflagellate, has been recently described as a de novo producer of azaspiracid-1 and -2 (AZA1 and -2) diarrhoeic toxins. A culture of A. spinosum was established in our laboratory and optimised for pilot-scale production of this organism, to evaluate and understand AZA1 and -2 accumulation and biotransformation in blue mussels (Mytilus edulis) fed with A. spinosum.  Adult mussels were continuously exposed to A. spinosum over 1 week in 160 L cylindrical conical tanks. Three different diets were tested for contamination: 5000, 10 000 cells mL−1 of A. spinosum and a mixture of 5000 cells mL−1 of A. spinosum with 5000 cells mL−1 of Isochrysis aff. galbana (T-Iso, CCAP 927/14). During the subsequent...
Tipo: Text
Palavras-chave: Azaspiracid; Azadinium spinosum; Marine biotoxins; AZA; Tissue distribution; Histology; Bivalve molluscs; Liquid chromatography coupled to tandem mass spectrometry.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00088/19877/17566.pdf

Toxicité sublétale du tétrachloroéthylène sur la crevette des marais Palaemonetes varians
Provedor de dados: 5
Autores: Lassus, Patrick; Chagot, Dominique; Miossec, Laurence; Bocquene, Gilles; Truquet, Philippe.
Tetrachloroethylene, a chlorinated solvent, is detected in the plume of East-Toulon domestic wastes treatment plant. Its subletal toxicity was tested du ring 31 days in a flow-through system at Pen Bron aquaculture centre, using swampshrimp Palaemonetes varians as test organism. Under expérimental conditions : natural variations in temperature and salinity , normal pH, ammonia and dissolved oxyg~n values, running tetrachloroethylene concentrations (10, 100 and 500 µg.l-1) induced neither mortalities nor any change in molting frequencies of experirnented animaIs. Histology of gills in contaminated animaIs showed several non specific deteriorations which could be observed either in control or assay animaIs. Necrosis levels nevertheless, seem to increase in...
Tipo: Text
Palavras-chave: Palaemonetes varians; Crustacés; Tetrachloroethylene; Flux continu; Rejets urbains; Histologie; Nécroses; Palaemonetes varians; Crustacees; Tetrachloroethylene; Flow through system; Urban wastes; Histology; Necrosis.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00156/26707/24782.pdf

Etude Histopathologique et Ultrastructurale d'une Maladie Rickettsienne Chez le Crabe Carcinus mediterraneus Czerniavski (Crustace Decapode).
Provedor de dados: 5
This study constitutes the first occurrence of a rickettsia-like organism causing a disease experimentally transmissible in marine crustaceans. The high pathogenous power of this microorganism is an important factor of the regulation of the populations of Carcinus mediterraneus.
Tipo: Text
Palavras-chave: Carcinus mediterraneus; Population control; Ultrastructure; Histology; Microorganisms; Diseases.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1933.pdf

Herpesvirus infection in European flat oysters Ostrea edulis obtained from brood stocks of various geographic origins and grown in Galicia (NW Spain)
Provedor de dados: 5
Autores: Da Silva, P; Renault, Tristan; Fuentes, J; Villalba, A.
We evaluated differences in productive traits and disease susceptibility among Ostrea edulis stocks. We produced 4 to 5 families from each of 4 oyster populations (Irish, Greek and 2 Galician) in a hatchery. Spat corresponding to 19 different families were transferred to a raft in the Ria de Arousa (Galicia, Spain) for grow-out. Samples of each family were histologically processed every month for 2 yr. One of the pathological conditions disclosed by histological examination was characterised by the occurrence of numerous abnormal cells throughout the connective tissue of various organs, showing hypertrophied nuclei with marginated chromatin and a characteristic large intranuclear acidophilic inclusion. Ultrastructural examination showed that the abnormal...
Tipo: Text
Palavras-chave: In situ hybridisation; Transmission electron microscopy; Histology; Bonamiosis; Ostreid herspesvirus 1; Ostrea edulis.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3735.pdf

Neoplasia detection in Macoma balthica from the Gulf of Gdansk: comparison of flow cytometry, histology and chromosome analysis
Provedor de dados: 5
Autores: Smolarz, Kasia; Renault, Tristan; Soletchnik, Patrick; Wolowicz, Macciek.
A flow cytometry protocol was applied for the detection of neoplasia in Macoma balthica L. from the Gulf of Gdansk (Baltic Sea, Poland). A simple method, based on an osmotic shock, was used to permeabilise gill cells. The cytometric pattern of normal clams consisted of 2 peaks, a major peak B and a smaller peak C. The cytometric pattern of affected clams consisted of 2 peaks named B' and C'. Two parameters were used to define the stages of abnormalities in M. balthica clams based on the percentage of cells in peaks B, C, B' and C' and on the ratio between the fluorescence value of peaks B, C, B' and C' in all individuals. Three stages of neoplasia were clearly distinguished by flow cytometry considering peak C'. Stage 1 was characterised by a major...
Tipo: Text
Palavras-chave: Baltic Sea; Macoma balthica; Neoplasia; Cytogenetics; Histology; Flow cytometry.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-2918.pdf

Comparison of dietary phospholipids and neutral lipids: effects on gut, liver and pancreas histology in Atlantic cod (Gadus morha L.) larvae
Provedor de dados: 5
Autores: Wold, P. -a.; Hoehne-reitan, K.; Cahu, Chantal; Zambonino, Jose-luis; Rainuzzo, J.; Kjorsvik, E.
The aim of the present study was to compare effects of dietary n-3 highly unsaturated fatty acids (HUFA) being incorporated in the phospholipid (PL) or in the neutral lipid (NL) fraction of the larval feed, on larval growth and histology of digestive organs in Atlantic cod (Gadus morhua L.) larvae. Three isoproteic and isolipidic diets, labelled according to the percentage of n-3 docosahexaenoic acid and eicosapentaenoic acid contained in NL1 or in PL1 and PL3 of the diets, were fed to cod larvae from 17 days post hatching (dph) to 45 dph. In the liver, hepatocytes and their nuclei were smaller in NL1 larvae compared with the PL larvae; the mitochondrial membrane structures were less dense and the amount of lipids observed in the liver was significantly...
Tipo: Text
Palavras-chave: Stereology; Phospholipids; Nutrition; Lipid class; Larvae; Histology; Diet; Cod.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6777.pdf

Infection chlamydienne chez le lavignon Scrobicularia piperatâ (P.) du bassin de Marennes-oleron
Provedor de dados: 5
Autores: Comps, Michel; Razet, Daniel; Cousserans, Francois.
Tipo: Text
Palavras-chave: Scrobicularia Piperatâ (P.); Chlamyd; Parasitology; Digestive Epithelium; Cytology; Histology.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1946.pdf

Bioactive extracellular compounds produced by the dinoflagellate Alexandrium minutum are highly detrimental for oysters
Provedor de dados: 5
Autores: Castrec, Justine; Soudant, P.; Payton, L.; Tran, D.; Miner, Philippe; Lambert, C.; Le Goic, N.; Huvet, Arnaud; Quillien, Virgile; Boullot, F.; Amzil, Zouher; Hegaret, Helene; Fabioux, C.
Blooms of the dinoflagellate Alexandrium spp., known as producers of paralytic shellfish toxins (PSTs), are regularly detected on the French coastline. PSTs accumulate into harvested shellfish species, such as the Pacific oyster Crassostrea gigas, and can cause strong disorders to consumers at high doses. The impacts of Alexandrium minutum on C. gigas have often been attributed to its production of PSTs without testing separately the effects of the bioactive extracellular compounds (BECs) with allelopathic, hemolytic, cytotoxic or ichthyotoxic properties, which can also be produced by these algae. The BECs, still uncharacterized, are excreted within the environment thereby impacting not only phytoplankton, zooplankton but also marine invertebrates and...
Tipo: Text
Palavras-chave: Harmful algal bloom (HAB); Crassostrea gigas; Paralytic shellfish toxins (PST); Bioactive extracellular compounds (BEC); Histology; Behavior.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54637/56042.pdf

Effects of bioactive extracellular compounds and paralytic shellfish toxins produced by Alexandrium minutum on growth and behaviour of juvenile great scallops Pecten maximus
Provedor de dados: 5
Autores: Borcier, Elodie; Morvezen, Romain; Boudry, Pierre; Miner, Philippe; Charrier, Gregory; Laroche, Jean; Hegaret, Helene.
Dinoflagellates of the genus Alexandrium are a major cause of harmful algal blooms (HABs) that have increasingly disrupted coastal ecosystems for the last several decades. Microalgae from the genus Alexandrium are known to produce paralytic shellfish toxins (PST) but also bioactive extracellular compounds (BEC) that can display cytotoxic, allelopathic, ichtyotoxic or haemolytic effects upon marine organisms. The objective of this experimental study was to assess the effects of PST and BEC produced by A. minutum upon juvenile great scallops Pecten maximus. Scallops were exposed for one week to two different strains of A. minutum, the first producing both PST and BEC and the second producing only BEC. Escape response to starfish, daily shell growth,...
Tipo: Text
Palavras-chave: Harmful Algal Bloom (HAB); Alexandrium minutum; Pecten maximus; Paralytic Shellfish Toxins (PST); Extracellular compounds; Behaviour; Histology.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00368/47878/47893.pdf

Etude histoensymologique de la digestion chez Ruditapes philippinarum
Provedor de dados: 5
Autores: Hily, A.
Examinations of alimentary tract and digestive tubules after feeding give evidence of continuous digestive process in juveniles of Ruditapes philippinarum . Histoenzymologic study of digestive tract suggests important intracellular enzymatic activities in stomacal epithelium, digestive gland and intestinal cells. Main part of intracellular digestion occurred in digestive cells by lysosyme associated with vacuolar system.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Bivalvia; Digestive system; Enzymatic activity; Histology; Digestive glands; Digestion; Enzymes digestives; Digestion; Bivalve.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1180.pdf

A shortcut method for sexing juvenile European sea bass, Dicentrarchus labrax L.
Provedor de dados: 5
Autores: Menu, Bruno; Peruzzi, Stefano; Vergnet, Alain; Vidal, Marie-odile; Chatain, Beatrice.
The objective of this study was to develop a rapid and effective method of sexing juvenile sea bass with minimum labour and material. To this end, the gonad squash mount technique was applied along with macroscopic techniques for sexing a large number of experimental fish at the age of 215-275 days post fertilization (p.f.). At this age, 90% of the 3894 fish could be unambiguously sexed by macroscopic examination of their gonads, whereas the remaining proportion was identified using squash mount preparations (10%). The accuracy of the observations was measured up to classical histology procedures. Undifferentiated fish accounted for 0.1% of the total population only. The application of the squash mount technique holds out the prospect of considerable...
Tipo: Text
Palavras-chave: Histology; Squash; Juvenile; Gonads; Seabass; Dicentrarchus labrax.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-378.pdf

Caractérisation génétique de l’effort reproducteur de l’huître creuse, Crassostrea gigas, dans le cadre des mortalités estivales de juvéniles : Approch QTL
Provedor de dados: 5
Autores: Flahauw, Emilie.
The Pacific oyster, Crassostrea gigas, is a major aquacultured species whose production represents an economic interest at worldwide, european and french levels. However, this species undergoes summer mortalities recorded from the beginning of the 20th century and, since 2008, this phenomenon increased and threatens mainly juvenile oysters. Aquaculture production of oysters suffers consequences of mass mortalities, that’s why this phenomenon has been studied for many years. In France, the bacterium Vibrio splendidus and the Ostreid virus Herpes Virus 1 (OsHV-1) are often associated with mass mortality outbreaks of juveniles oysters and it was demonstrated that selected individuals for resistance to summer mortality were able to slow the increasing in viral...
Tipo: Text
Palavras-chave: Huître creuse du Pacifique; Crassostrea gigas; Mortalités estivales; Survie; Effort reproducteur; Imagerie par Résonance Magnétique; Histologie; Marqueurs microsatellites; Marqueurs SNP; Cartographie de liaison; Détection de QTL; Pacific oyster; Crassostrea gigas; Summer mortality; Survival; Reproductive effort; Magnetif Resonance Imaging; Histology; Microsatellites; SNPs; Linkage mapping; QTL detection.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00233/34377/33786.pdf

Reproductive dynamics of swordfish (Xiphias gladius) in the southwestern Indian Ocean (Reunion Island). Part 1: oocyte development, sexual maturity and spawning
Provedor de dados: 5
Autores: Poisson, Francois; Fauvel, Christian.
The reproductive dynamics of swordfish (Xiphias gladius) was investigated from catches of the Reunion Island-based longline swordfish fishery between 19-25 degrees S and 48-54 degrees E. Thus, 1727 swordfish (size range 75-289 cm, lower jaw-to-fork length, LJFL) were sampled on board commercial fishing vessels during the period of May 1998 to January 2001. Reproductive activity was assessed using macroscopic gonad characteristics, trends of gonadal indexes for both sexes, oocyte size-frequency distributions and microscopic investigation of oocyte development stages. Size at first maturity (L-50) for female and male swordfish was estimated in Indian Ocean for the first time. L50 was estimated at 170 cm and 120 cm (LJFL) for females and males, respectively....
Tipo: Text
Palavras-chave: Indian Ocean; Xiphias gladius; Swordfish; Seasonal distribution; Size at first maturity; Histology; Spawning season; Sex ratio; Reproduction.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6353.pdf

Juvenile oyster disease (JOD) in American oysters, Crassostrea virginica, reared in France. Detection of abnormal calcium deposits in gill and mantle tissues
Provedor de dados: 5
Autores: Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno; Maffart, Patricia.
Progeny of Crassostrea virginica oysters, introduced into France in 1992, were reared during 1992 and 1993, to test their growth performances. These assays were performed to investigate the possible replacement of Crassostrea gigas with a non indigenous species, Crassostrea virginica. During the summer of 1993, sporadic mass mortalities (80-90%) occurred among young, Crassastrea virginica, oysters reared in the IFREMER nursery in La Tremblade (Charente Maritime).
Tipo: Text
Palavras-chave: Histology; Crassostrea virginica; Mortality; Oysters.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2975.pdf

The Digestive Function of Pseudoplatystoma punctifer Early Juveniles Is Differentially Modulated by Dietary Protein, Lipid and Carbohydrate Content and Their Ratios
Provedor de dados: 5
Autores: Castro-ruiz, Diana; Andree, Karl B.; Solovyev, Mikhail M.; Fernández-méndez, Christian; García-dávila, Carmen; Cahu, Chantal; Gisbert, Enric; Darias, Maria J.
Pseudoplatystoma punctifer is an Amazonian catfish highly appreciated for its high flesh quality, size, and commercial value. Its aquaculture is pursued to satisfy the demands of an increasing population in the region. However, knowledge of the nutritional needs during the early life stages is necessary for improving growth and reducing the incidence of cannibalism, factors that limit the success of its commercial farming. This study aimed at evaluating the influence of four diets containing different protein and lipid levels (30:15, 30:10, 45:15, or 45:10 in %) in the digestive physiology and performance of early juveniles. The results showed that the dietary protein:lipid as well as carbohydrate levels and ratios influenced differently the whole-body...
Tipo: Text
Palavras-chave: Neotropical fish; Aquaculture; Digestive enzymes; Gene expression; Nutrition; Juveniles; Histology; Development; Macronutrients; Diet.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/79019/81420.pdf

Recherches sur une maladie epizootique de l'huitre plate Ostrea edulis Linne
Provedor de dados: 5
Autores: Bonami, Jean-robert; Grizel, Henri; Vago, Constantin; Dutholt, Jean-louis.
Digestive glands of Ostrea edulis affected by an epizootic have been examined by light- and electron- microscopy. Round, compact lesions in the digestive gland cells contain refractive elements staining slightly blue or red with Geimsa. Ultra-structurally, each lesion contains (a) dense cytoplasma, without mitochondria and with paracrystal-line inclusions, (b) enclosed regions with vacuolar cytoplasm, no mitochondria and two types of formation; one is opaque, the other a vacuole containing ribosomes, lamellar structures and peripheral ovoid particles. The nature and significance of these structures is not known.
Tipo: Text
Palavras-chave: Histology; Epizooty; Ostrea edulis.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2238.pdf

Mortalités estivales de l'huître Crassostrea gigas dans le bassin d'Arcachon : facteurs du milieu, aspects biochimiques et histologiques
Provedor de dados: 5
Autores: Maurer, Daniele; Comps, Michel.
Previous pathological studies have not permitted to implicate infectious disease in summer mortalities of oysters Crassostrea gigas, in the Arcachon bay. In 1983, these summer mortalities, occurring mostly among 1 year old oysters, have been the subject of new investigations. In order to establish the causes of mortalities, oysters of the same origin were held in two areas characterized by different prevalence of mortality for 6 months, during which measurements of physiological and biochemical condition and certain histological observations were made. The study has been completed by environmental observations. Different rates of mortality appeared between the two selected areas: 30 %in Taussat in the upper part of the bay, under a continental influence...
Tipo: Text
Palavras-chave: Histology; Biochemistry; Environment; Summer mortality; Crassostrea gigas; Histologie; Biochimie; Environnement; Mortalité estivale; Crassostrea gigas.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-4317.pdf

First report of a Mikrocytos-like parasite in European oysters Ostrea edulis from Canada after transport and quarantine in France
Provedor de dados: 5
Autores: Gagne, N; Cochennec, Nathalie; Stephenson, M; Mcgladdery, S; Meyer, G; Bower, S.
As part of a disease resistance experiment, 112 apparently healthy European flat oysters Ostrea edulis L. were exported from Canada (Nova Scotia) into France to test their susceptibility to Bonamia ostreae infection. Twelve oysters died in transit and 17 others died within 2 wk of laboratory quarantine acclimation. All oysters were examined histologically, and the 17 that died during quarantine were assayed for microcells (Bonamia sp. and Mikrocytos mackini) using molecular techniques. A microcell parasite was detected in the connective tissue of 5 of the 112 oysters. Morphological appearance, tissue affinity and molecular characterization through PCR, in situ hybridization (ISH), fluorescence in situ hybridization (FISH) and sequencing revealed a protist...
Tipo: Text
Palavras-chave: Histology; PCR; In situ hybridization; Ostrea edulis; Mikrocytos.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4475.pdf

Trophic relationships gonad-intestinal loop in Pecten maximus .
Provedor de dados: 5
Autores: Lepennec, M; Dorange, G; Beninger, P; Donval, A; Widowati, I.
Histological, histochemical and ultrastructural studies were performed on the region of the gonad traversed by the intestine in Pecten maximus . The results indicate a digestive and absorptive function of intestine epithelial cells and a transfer of metabolites to the surrounding gonad tissue. Several possible mechanisms of translocation are presented, including diffusion into the haemolymph and transfer via vacuolated cells of the gonad interstitial connective tissue.
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Histology; Haemolymph; Histochemistry; Cells; Metabolites; Epithelia; Intestines; Ultrastructure; Animal reproductive organs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1668.pdf

Histological abnormalities related to mortality in penaeid shrimp (Penaeus stylirostris) reared in New-Caledonia
Provedor de dados: 5
Autores: Berthe, Franck; Legroumellec, Marc; Haffner, Philippe; Renault, Tristan.
Outbreaks of mass mortality occurred since 1993 in penaeid shrimp (Penaeus stylirostris) reared in New-Caledonia. Since then, the disease, called "syndrome 93" (S93) has inflicted serious losses (60 to 100%) during the cold period and thus must be considered as an economically significant disease.
Tipo: Text
Palavras-chave: Penaeus stylirostris; Penaeid shrimp; Mortality; Histology.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2974.pdf

Histological study of a cellular reaction in Ruditpaes decussatus infected by a protozoan
Provedor de dados: 5
Autores: Chagot, Dominique; Comps, Michel; Boulo, Viviane; Ruano, Francisco; Grizel, Henri.
An infection caused by a Perkinsus -like parasite has been observed in Ruditapes decussatus from Portugal (Comps and Chagot, 1987). Following a pathological study carried out on clams affected by mortalities in the Algarve area, this parasite was found again, inducing a reaction process in the host. Histological examination reveals the parasite in the connective tissue of different organs. The adjoining tissues, particularly the epithelia, are not affected.
Tipo: Text
Palavras-chave: Cells; Histology; Pathology; Ruditapes decussatus.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3109.pdf

Dynamique et enzymologie de la digestion chez l'huitre Crassostrea gigas
Provedor de dados: 5
Autores: Boucaud, C; Lebesnerais, C; Lubet, P; Lihrmann, I.
Feeding experiments carried out on Crassostrea gigas allowed the authors to set up the stages and the timing of the movement of food throughout the digestive tract. Various activities involved in digestion (glycosidases, esterases, and peptidases) were investigated histochemically in the digestive tract in order to localize the sites of absorption and the sites of protein and carbohydrate digestion. An explicative model of the different stages of digestion is proposed.
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Cytology; Histochemistry; Histology; Digestive system; Enzymatic activity; Digestive glands; Digestion; Enzymes; Transit digestif; Digestion; Huitre; Crassostrea gigas.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1179.pdf

Histological Study of the Salivary Glands in Zaedyus pichiy (Mammalia, Xenarthra, Dasypodidae)
Provedor de dados: 77
Autores: Estecondo,Silvia; Codón,Stella Maris; Casanave,Emma Beatriz.
The histology of the salivary glands of the armadillo Zaedyus pichiy (Desmarest, 1804) was studied. Three pairs of major compound tubuloacinar salivary glands, parotid, submandibular and sublingual, were distinguished. The parotid gland is histologically a serous gland. The submandibular gland consists of two lobes. The anterior lobe is composed of mixed and serous acini. The posterior lobe is predominantly mucous. There is a reservoir or salivary bladder, related with the anterior lobe. The sublingual gland is mixed, composed of mucous acini with scattered serous demilunes
Tipo: Journal article
Palavras-chave: Mammals; Xenarthra; Armadillos; Dasypodidae; Zaedyus pichiy; Histology; Salivary glands.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022005000100004

Ginkgo biloba Effects on Mice Fetal Liver
Provedor de dados: 77
Autores: Zehra,Uruj; Tahir,Mohammad; Jaffery,Fahim H; Lone,Khalid P.
Ginkgo biloba is considered to be an alternative drug for various indications; unfortunately very few studies are available on its side effects. This present study describes the harmful effects of Ginkgo biloba on developing fetal liver. Two experimental groups of six pregnant female mice each were given Ginkgo biloba at human therapeutic dose (A) and a higher dose (B) throughout the gestation period. A third group (C) was taken as a control and given distilled water only. Fetal livers were examined and the effects of the drug observed. There were signs of congestion and fatty change along with dilatation of sinusoids in a dose dependent manner concluding that Ginkgo biloba affects fetal liver.
Tipo: Journal article
Palavras-chave: Ginkgo biloba; Fetal liver; Congestion; Fatty change; Histology.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300017

Morphological Studies on the Gills of Puffer Fish (Lagocephalus sceleratus, Gmelin, 1789)
Provedor de dados: 77
Autores: Abumandour,Mohamed M. A; Gewaily,Mahmoud S.
In the present study, we focused on the morphology of L. sceleratus gills using gross anatomy, scanning electron microscopy as well as light microscopy. Results of this study revealed that the gill openings appeared as simple slits anterior to the pectoral fin without distinct opercular cover. The gill system consisted of three pairs of gill arches carrying two rows of gill rakers on its concave border and gill filaments on its convex border. SEM showed that all surfaces of the gill arch were characterized by the presence of the longitudinal ridges with many taste buds in addition to many spines around the rakers. Histologically, the gill arch was composed of curved bar of hyaline cartilage with slightly elevated area corresponding to the sites of gill...
Tipo: Journal article
Palavras-chave: Lagocephalus sceleratus; Gills; Anatomy; SEM; Histology.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300001

Toxic Effects of Methanolic Extract of Aspilia africana Leaf on the Estrous Cycle and Uterine Tissues of Wistar Rats
Provedor de dados: 77
Autores: Oluyemi,Kayode A; Okwuonu,Uche C; Baxter,D. Grillo; Oyesola,Tolulope, O.
Effects of graded dosages of methanolic extract of Aspilia Africana were examined on the estrous cycle, uterine weights and histology to determine its effects on the reproductive functions of 25 cyclic female rats. The rats were randomized into five groups A, B, C, D, and E. They were given Omg/kg body weight, 150 mg/kg body weight, 200 mg/kg body weight, 250 mg/kg body weight, and 300 mg/kg body weight, respectively. The effect on the estrous cycle was determined by vaginal lavage while routine histological preparations were done with haematoxylin-eosin stains. All values were statistically compared at appropriate confidence intervals. Estrous cycles were significantly reduced in a dose-dependent manner and histology revealed a dose-dependent toxicity
Tipo: Journal article
Palavras-chave: Aspilia africana; Estrous; Uterine weight; Histology; Reproductive functions.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000300023

The Liver Micromorphology of the African Palm Squirrel Epixerus ebii
Provedor de dados: 77
Autores: Ikpegbu,E; Nlebedum,U. C; Nnadozie,O; Agbakwuru,I. O.
The normal liver histology of the African palm squirrel Epixerus ebii was investigated to fill the information gap on its micromorphology from available literature. The liver was covered by a capsule of dense connective tissue- the perivascular fibrous capsule. Beneath this capsule is the liver parenchyma were the hepatocyte were supported by reticular fibres. The hepatocytes in the lobules were hexagonal to polygonal in shape. Some hepatocytes were bi-nucleated. Clear spaces in the parenchyma must be storage sites for lipids in the liver. The classic hepatic lobules presented central vein surrounded by several liver cells. At the portal triad, hepatic vein, hepatic arteries and bile ducts were seen. While the hepatic arteries and veins were lined by...
Tipo: Journal article
Palavras-chave: Palm squirrel; Liver; Histology; Portal triad.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000100040

Age Related Structural Changes in the Bulbourethral Gland of Gaddi Goat (Capra hircus)
Provedor de dados: 77
Autores: Archana,P; Katiyar,R. S; Sharma,D. N; Farooqui,M. M; Prakash,Ajay.
A study was conducted on the bulbourethral glands of 30 Gaddi goats, divided into three groups of 10 animals in each viz; Prepubertal (1 day old to &lt; 18 months of age), Pubertal (18 months to &lt; 5yrs of age) and Postpubertal (&gt;5yrs of age). The study revealed that the glands grew at a faster speed up-to 6 months of postnatal life after which the pace slowed down considerably. Almost 10 times increase in weight and more than three times increase in all the linear mensurations were observed in prepubertal group from the time of birth. The stroma vs parenchyma ratio which was 80:20 in one-day-old kids showed three times increase in parenchyma in prepubertal animals, and the ratio became 43:57. In one day old kids luminated and non-luminated secretory...
Tipo: Journal article
Palavras-chave: Bulbourethral gland; Gaddi goat; Histology; Histochemistry.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000200049

Histological Observation of the Stomach of the Yellow-billed Grosbeak
Provedor de dados: 77
Autores: Zhu,Lei; Wang,Jun Jie; Shi,Xiao Dong; Hu,Jiang; Chen,Jian Gang.
The stomachs of the yellow-billed grosbeaks were examined by means of light microscopy. The mucous membrane of the proventriculus presented many folds and sulci. The sulci were lined by simple columnar cells with basal nuclei and clear acidophilic cytoplasm. The proventriculus glands were constituted by many round or elliptical glandular lobules. The sulci and the collecting duct of compound tubular glands showed an intense positive reaction in PAS and AB stain. The gizzard was characterized by an internal abrasion-resistant lining cuticle and a thick muscular layer. The cuticle, gizzard glands and muscular layer in two sides were thicker than those in the cranial and caudal.
Tipo: Journal article
Palavras-chave: Yellow-billed Grosbeak; Proventriculus; Gizzard; Histology.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200025

Histology and Scanning Electron Microscopy of the Lower Respiratory Tract in the Adult Red Fox (Vulpes vulpes)
Provedor de dados: 77
Autores: Moussa,Eid A; Hassan,Said A.
The study was conducted on a total of three adult healthy freshly killed red foxes of both sexes weighing about 4-6 kg collected from Abou Rawwash, Giza, Egypt. The wall of trachea and bronchi formed of mucosa, submucosa and adventitia. The mucosa formed of pseudostratified columnar epithelium and lamina propria. The respiratory epithelium composed of tall columnar ciliated, goblet cells, basal cells, and neuroendocrine cells. Goblet cells account for about 20 to 30% of cells in the more proximal. Basal cells are relatively small triangular cells whose bases are attached to the basement membrane. The primary bronchiole is lined by simple columnar nonciliated to cuboidal epithelium containing some bronchiolar exocrine cells and some goblet cells....
Tipo: Journal article
Palavras-chave: Scanning; Fox; Respiratory; Histology.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100042

Academic Achievement and Perception of Two Teaching Methods in Histology: Light Microscopy and Digital Systems
Provedor de dados: 77
Autores: Becerra G,Daniela; Grob L. P,Melisa; Rodríguez R,Ángel; Barker M,María José; Consiglieri L,Lucas; Ferri G,Giorgio; Sabag S,Natividad.
With the advent of digital systems, the role of the microscope as an irreplaceable instrument in the practical teaching of histology has been called into question. In this study academic performance and student perception for three learning methods was compared: digital systems, microscopy, and microscopy plus digital systems, in the muscle tissue unit of the morphology course for first-year dentistry at the Universidad de los Andes, Santiago, Chile. Ninety-five students were divided into 3 groups: Group 1: individual optical microscopy, Group 2: digital systems (one projector per room), and Group 3: microscopy plus digital systems. All participants observed the same striate muscle, cardiac striated muscle, and smooth muscle mounts. Their diagnostic...
Tipo: Journal article
Palavras-chave: Medical education; Histology; Visual learning; Virtual slides; Microscopy.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300001

The Structural Organization of the Liver in the Chinese Fire-bellied Newt (Cynops orientalis)
Provedor de dados: 77
Autores: Xie,Zhao Hui; Zhong,Hong Bo; Li,Hai Jun; Hou,Yu Jie.
The morphology of Chinese fire-bellied newt liver consists of 5 lobes, with exception of a few individual differences present, which are composed by a number of hepatic lobules. Passing through the center of the lobules, a central vein radiates and is arranged in orderly row from one to several layers. The interval of the hepatic cords or masses are irregular and variable sinusoid. The hepatic sinusoidal wall consists of one layer endothelial cells or Macrophagocytus stellatus (Kupffer cells), which have protrusions and elongations. The intervals of the hepatic cells have perisinusoidal space (space of Disse). The hepatic cell is polygonal in shape with uniform, round or oval nucleus, 17.8­12.4µm in diameter, mean 14.2 µm 2-6 nucleoli, nuclear-cytoplasmic...
Tipo: Journal article
Palavras-chave: Cynops orientalis; Liver; Histology; Morphology.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400041

A Comparative Study of Fixatives for Axolotl Blastema Tissue
Provedor de dados: 77
Autores: Keskin,Ilknur; Yildirim,Berna; Kolbasi,Bircan; Öztürk,Gürkan; Demircan,Turan.
Regeneration is defined as tissue renewal and functional restoration process of the damaged parts of the body after an injury. Ambystoma mexicanum, commonly named the Axolotl, is one of the unique vertebrates, which has a remarkable ability to regenerate their extremities following the amputation. Although the process of regeneration includes several periods, it can be divided into two main phases; blastema formation and dedifferentiation. In the couple of hours following the amputation, wound closure occurs by migration of epithelial cells around the amputation site followed by macrophage infiltration and dedifferentiation of cells to turn into stem cells. Accumulated stem cells form a very authentic tissue type called blastema, which is crucial for...
Tipo: Journal article
Palavras-chave: Axolotl; Blastema; Fixatives; Histology.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100009

Regenerative Capacity and Histomorphometric Changes in Rat Sciatic Nerve Following Experimental Neurotmesis
Provedor de dados: 77
Autores: Lós,Deniele Bezerra; Novaes,Karyne Albino; de Miranda,Filipe Barbosa Cunha; Lira,Kamilla Dinah Santos de; Andrade,Rodrigo Fragoso de; Moraes,Sílvia Regina Arruda de.
Through a wide range of cellular and molecular events, the peripheral nervous system is endowed with great regenerative capacity, responding immediately to injuries that occur along the length of the nerve. The aim of this study was to histomorphometrically assess the degree of maturity of the nervous tissue and possible microscopic changes in newly formed nerve segments 60 days after experimental neurotmesis of the sciatic nerve in rats. Control Group (CG) and an Injury Group (IG) were used. IG underwent neurotmesis of the sciatic nerve of the right foot, with immediate surgical repair using the tubulization technique. 60 days following experimental surgery, animals from both groups had their sciatic nerves collected for histomorphometric analysis....
Tipo: Journal article
Palavras-chave: Nerve Tissue; Nerve Regeneration; Peripheral Nerve Injuries; Vasa nervorum; Histology.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200056

Histopathology of Organs from Neonate Offspring Born to Female Rats Exposed to Sublethal Doses of Biological and Synthetic Insecticides
Provedor de dados: 77
Autores: dos Santos,Hilda Michelly Paiva; Teixeira,Valéria Wanderley; Teixeira,Álvaro Aguiar Coelho; da Silva,Rosimere; Lemos,Ana Janaina Jeanine Martins; Neto,Clovis José Cavalcanti Lapa; Ferreira,Cintia Giselle Martins.
The current annual consumption of insecticides in agriculture in Brazil is over three million tons. The exposure happens through food that is contaminated with toxic waste and respiratory and dermal absorption. Biological control with Bacillus thuringiensis Berliner (Bt) has assumed increasing importance replacing the use of conventional insecticides. However, the tests used to justify approval for use and market release of Bt products, and the protocols used to assess the development of toxicity, are extremely superficial. In addition, more studies comparing effects between males and females and during pregnancy and lactation have not been conducted. Thus, the hypothesis tested in this study was if the administration of the XenTari® WG (Bacillus...
Tipo: Journal article
Palavras-chave: Bacillus thuringiensis; Synthetic insecticide; Rats; Histology; Histochemistry.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100040

Anomalies, Aneurysm and Histology of the Middle Cerebral Artery in Nigerian Africans
Provedor de dados: 77
Autores: Idowu,O. E; Shokunbi,M.T; Malomo,A. O; Akang,E. E. U.
The histology of the middle cerebral artery (MCA) in Nigerian Africans has not been previously studied. One hundred MCAs obtained at autopsy from fifty adult Nigerians were studied. The vessels were processed and stained with Ehrlich's haematoxylin and eosin, elastic Van Gieson and Masson's trichrome stains. Early branches were given off before the perforators in two middle cerebral arteries, and there was one accessory MCA, making an incidence of anomalies of 3%. No aneurysm was observed in any of the cases. The internal elastic laminas were well developed but the external elastic laminas of the vessels were poorly developed. Cióse to the bif urcations the túnica media tapered gradually and at the bif urcations, the túnica media was completely deficient...
Tipo: Journal article
Palavras-chave: Anomalies; Histology; Middle cerebral artery.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400038

HISTOLOGICAL STUDY OF THE SALIVARY GLANDS IN Dasypus hybridus (MAMMALIA, DASYPODIDAE)
Provedor de dados: 77
Autores: Codón,Stella Maris; Estecondo,Silvia; Casanave,Emma Beatriz.
The histology of the salivary glands of the armadillo Dasypus hybridus (Desmarest, 1804), was studied. Two pairs of salivary glands, parotid and submaxillary, and a salivary bladder are distinguished. Parotids are located anteriorly to the submaxillary glands. They are purely serous glands and excretory intralobular ducts, intercalated and particularly striated ones, are very numerous. Submaxillary glands are of greater size. They possess two lobes, which differs in their histology and histochemistry. The anterior lobe is mixed and the presence of numerous intralobular excretory ducts is remarkable. The bigger posterior lobe is mucous. Intralobular excretory ducts are observed, but they are not as abundant as in the anterior portion
Tipo: Journal article
Palavras-chave: Mammals; Armadillos; Dasypodidae; Dasypus hybridus; Histology; . Salivary glands.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000300003

Morphological Alterations in Mouse Placenta Induced by Diazepam
Provedor de dados: 77
Autores: Márquez-Orozco,María Cristina; Gasca-Ramírez,María Verónica; de la Fuente-Juárez,Graciela; Márquez-Orozco,Amalia.
Diazepam (DZ) is a benzodiazepine that belongs to the group of minor tranquilizers with myo-relaxing and anticonvulsant properties. DZ and its metabolites cross the placental barrier in human, monkey, hamster, and mouse, and accumulate in the placenta. Our aim was to investigate, through histological techniques, and semifine sections if DZ induces morphological changes in the placenta. Twenty female mice of the ICR strain were distributed randomly in two groups. One group (DZ) was treated from days 6 to 17 of gestation with a single daily subcutaneous (sc) dose of DZ of 2.7 mg/kg/ (bw); the second, control group (C) was treated with saline solution. All females (10 DZ and 10 C) were killed by decapitation. Placentas were extracted and fixed in...
Tipo: Journal article
Palavras-chave: Benzodiazepine; Diazepam; Mouse; Placenta; Histology.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200007

The Histological Differences of the Ureter in Japanese Quail (Coturnix japonica) Compared With Some Other Domestic Avian Species
Provedor de dados: 77
Autores: Oliaii,Arash; Mobini,Behzad.
The aim of this investigation was to determine the histological differences of anatomical regions of the ureter in Japanese quail compared with some other domestic avian species such as pigeon, European starling and fowl. Tissue samples from proximal, middle and distal regions of each ureter were obtained and stained with H &amp;amp; E, Alcian blue (pH 2.5), Periodic acid-Schiff, Masson's trichrome, Verhoeff's, and Gomori's method for reticulum. The histology and histochemistry of the ureter showed considerable differences among various anatomical regions of the ureter. No significant sex-based differences were found. The primary branches of ureter were composed of tunica mucosa, submucosa, muscularis and serosa, whereas the wall of smaller branches of...
Tipo: Journal article
Palavras-chave: Histology; Japanese quail; Region; Sex; Ureter.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100032

HISTOLOGY OF THE JAW DEFORMATION IN SALMON OF SOUTHERN CHILE
Provedor de dados: 77
Autores: Venegas,Felipe; Montiel,Enrique; Forno,Pablo; Rojas,Mariana.
In adult salmon of the sea centres in southern Chile, a jaw deformation (JD) has been identified. It affects the dental and hyomandibular bones, which bend ventrally up to 90&amp;deg; of their normal position. The deformation affects also the dental articular bone. This pathology is related to weight loss and increased mortality of the salmons. It was empirically postulated that a probable cause for this anomaly was food from vegetal origin in the diet of the fishes (which are carnivores) Therefore, the present work aims at comparing the biostructure of jaw bone of salmons fed either with vegetal (soja and gluten) formulation or animal formulation, mostly fish powder. Fifty specimens were analyzed from Puerto Montt, 35 having JD and 15 normal control....
Tipo: Journal article
Palavras-chave: Jaw; Jaw deformation; Histology; Salmon; Salmo salar.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000300005

Histological Analysis of the Reproductive System and Gonad Maturity of Octopus rubescens
Provedor de dados: 77
Autores: López-Peraza,D. J; Hernández-Rodríguez,M; Barón-Sevilla,B; Bückle-Ramirez,L. F.
This study described the reproductive system and gonadal development of Octopus rubescens from Bahía de Todos Santos, Baja California, Mexico. A total of 65 organisms, 35 males weighing 7.2 to 543.4 g and 30 females from 9.4 to 87.7 g where analyzed. The gonad development was defined through histological methods using Hematoxylin-eosin and Arteta- trichrome stains. We describe macroscopically the reproductive system of males and females, and characterized each of the anatomic components. Eight stages of maturity were recognized in females: 1. Immature, 2. Initial folliculogenesis, 3. Final folliculogenesis, 4. Previtelogenesis, 5. Early vitelogenesis, 6. Final vitelogenesis, 7. Maturing and 8. Spawn. In males five stages were identified: 1. Immature, 2....
Tipo: Journal article
Palavras-chave: Octopus rubescens; Histology; Reproductive system; Gonad maturity.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400050

Histological and Histochemical Changes by Clove Essential Oil Upon the Gonads of Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae)
Provedor de dados: 77
Autores: Cruz,Glaucilane dos Santos; Teixeira,Valeria Wanderley; de Oliveira,Jose Vargas; Teixeira,Alvaro Aguiar Coelho; Araújo,Alicely Correia; Alves,Thiago Jose de Souza; da Cunha,Franklin Magliano; Breda,Mariana Oliveira.
Spodoptera frugiperda is a polyphagous insect that causes economic losses to several crops in Brazil and is the major obstacle to corn production. Researches focusing on alternative control, e.g. botanical products are expanding to offer a wide variety of molecules that interfere with different biological parameters of insect pests. Thus, this study tested the hypothesis that clove essential oil affects the spermatogenesis, ovarioles histochemistry and the fertility of S. frugiperda. The results showed that clove essential oil affects the gametogenesis of S. frugiperda ovarioles, reflecting negatively on its reproduction, proving to be a promising tool for controlling this pest.
Tipo: Journal article
Palavras-chave: Fall armyworm; Spodoptera frugiperda; Reproduction; Histochemistry; Histology; Syzygium aromaticum.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400034

Can Formaldehyde Exposure Induce Histopathologic and Morphometric Changes on Rat Kidney?
Provedor de dados: 77
Autores: Golalipour,Mohammad Jafar; Azarhoush,Ramin; Ghafari,Soraya; Davarian,Ali; Fazeli,Seyyed Amirhossein.
Formaldehyde is used traditionally for fixing the cadaver, and vaporized during dissection and practical studying on cadaver. This study was designed to determine the histopathologic and morphometric changes of rat kidney while all of the experiments were exposed to formaldehyde for 18 weeks. 28 male albino Wistar rats were divided into the following three experimental groups (E1: 2hrs/d, 2d/w; E2: 2hrs/d, 4d/w; E3: 4hrs/d, 4d/w) and one control group (C). when the exposure period was expired the animals were anaesthetized with chloroform. After cervical dislocation, the abdomen was dissected and the kidneys were taken. The kidney specimens were sectioned and stained with Haematoxylin and Eosin technique for histologic and morphometric study. Data were...
Tipo: Journal article
Palavras-chave: Formaldehyde; Exposure; Histology; Kidney; Rat; Morphometry.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400037

Morphology and Histochemistry of the Liver of Carnivorous Fish Hemisorubim platyrhynchos
Provedor de dados: 77
Autores: Faccioli,Claudemir Kuhn; Chedid,Renata Alari; Bombonato,Maria Terezinha Siqueira; Vicentini,Carlos Alberto; Vicentini,Irene Bastos Franceschini.
The aim of this study was to characterize the normal structure of the liver of Hemisorubim platyrhynchos, a carnivorous freshwater catfish found in Neotropical region, using gross anatomy, histology and histochemistry. Anatomically, the liver presents C-shaped and only two lobes: smaller right and bigger left. The gallbladder is located in right lobe and shows elongated shaped. Histological analysis demonstrated that the hepatic parenchyma is made of two hepatocytes plates surrounded by sinusoids. The hepatocytes are polygonal-shaped cells, with spherical nucleus and a dark prominent nucleolus. The cytoplasm presents large amount of lipids and glycogen deposits PAS positives. There are no hepatic lobules or portal triads. Bile ducts are lined by columnar...
Tipo: Journal article
Palavras-chave: Anatomy; Histology; Hepatocytes; Extrahepatic Pancreas; Teleost.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000200055

Morphological Analysis of Neonates of Rats Treated with Dexamethasone in the Initial Phase of Pregnancy
Provedor de dados: 77
Autores: Vilaça Júnior,Paulo Estevao Araújo; Teixeira,Alvaro Aguiar Coelho; Wanderley Teixeira,Valéria; Moraes,Eleonora de Figueiredo; Araújo,Ana Claudia Carvalho de; Maia,Carina Scanoni.
The glucocorticoid dexamethasone has been largely used due to its anti-inflammatory effect. However, several authors report that the excessive exposition to it during pregnancy may cause a retard in the development in several tissues, mainly: liver, lungs and kidneys. But, the majority of the works are done with the application of dexamethasone in the late periods of pregnancy. Because of the lack of researches that evalúate the effects in the beginning of gestation, this paper aimed at evaluating the effect of dexamethasone administered in the initial phase of pregnancy, o ver the morphology of neonates rat. It was used 10 albino rats (Rattus norvegicus albinus) aged 90 days from the lineage Wistar. The female were coupled and divided in two groups: Group...
Tipo: Journal article
Palavras-chave: Pregnancy; Dexamethasone; Histology; Rats.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300002

Carotid Arteries in the Dog: Structure and Histophysiology
Provedor de dados: 77
Autores: Orsi,Antonio M.; Domeniconi,Raquel F.; Artoni,Silvana Martinez B.; Filho,Joffre G.
Light microscopy analysis of the mural structure of the common carotid artery, internal carotid artery and external carotid artery in mongrel dog revealed variability in the middle values of vascular diameter and thickness of the intimal plus medial coats and adventitial coat. The vascular diameter did not differ between the internal carotid artery and external carotid artery, but was significantly increased in the common carotid artery from which the other two arteries had origin. The increased thickness of the intimal plus medial coats of the common carotid artery revealed the constant mechanical adjustment of the arterial wall and local shearing stress that occurred among the arterial coats. The adventitial coat of the internal carotid artery was...
Tipo: Journal article
Palavras-chave: Carotid arteries; Histology; Histophysiology; Dog.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000300019

Mucous Membrane of the Rumen of Ovines, Fed With Spineless, Forrage Cactus or Palm (Barbary Fig) (Opuntia ficus indica Mil): Hystochemical Study by Means of Light Microscopy
Provedor de dados: 77
Autores: Neiva,Gentileza Santos Martins; da Mota,Diógenes Luís; Batista,Ângela Maria Vieira; Sousa-Rodrigues,Célio Fernando de.
The mucosa of the rumen performs the functions of absorption, transportation, metabolism and protection, due to the presence of microorganisms in this compartment of the digestive tract, which are responsible for the digestion of approximately 60% of the organic material apparently digested. The histological structure and the histochemical profile of glicoconjugate of the mucosa of the stomach of sheep that were being fed with forrage cactus or palm (Giant Palm - Opuntia ficus indica Mil)1. Twelve sheep were used, with approximately 14 months old, which were oddly distributed in four diets: D1- 60.0% forrage palm + 40.0% concentrated ration; D2- 47.5% forrage palm + 12.5% elephant, napier grass + 40.0% concentrated ration, and D3 - 34,8% forrage palm +...
Tipo: Journal article
Palavras-chave: Mucous membrane; Histology; Histochemistry; Forrage palm; Forrage cactus; Ovine.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500034

Morphogenesis of a Tunica Mucosa of Oviduct of the Hens
Provedor de dados: 77
Autores: Khokhlov,R. YU.; Kuznetcov,S. I.
The authors have used non-laying and laying hens (Lohmann Brown), in order to study morphological aspects development of tunica mucosa of the oviduct. The results showed that the oviduct of the hen is well-developed at the left side, atrophied at the right side and consists of five different regions: infundibulum, magnum, isthmus, shell-gland and excretory section (vagina). During 1-120 days in oviduct is the most advanced caudal part, where height and width folds of a tunica mucosa is more than in cranial part, that probably, is caused with the future function of these departments. In the period oviposition (150-540 days), the tunica mucosa is most advanced in such departments, as: magnum, isthmus, shell-gland
Tipo: Journal article
Palavras-chave: Oviduct; Anatomy; Histology; Morphology.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200014

Characteristics of the Gustatory Organs on the Tongue of the Chinese Fire-bellied Newt (Cynops orientalis): Light and Scanning Electron Microscopy Study
Provedor de dados: 77
Autores: Xie,Zhaohui; Li,Jingting; Cheng,Pu.
The dorsal surface of the tongue gustatory organs of Chinese fire-bellied newt (Cynops orientalis) was observed by employing the light and scanning electron microscopy (SEM) techniques. The results revealed that the rostral and median part of the tongue presents a round apex and covered by taste disks (TDs). They are usually roundish or ellipsoidal in shape and are 20-35 mm in diameter. The many openings of the lingual glands are 4-8 mm in diameter exist in the lateral border or median part of lingual body. The gustatory organs on the tongue did not differed form those presented in other species in Caudates. These may indicate the functions of gustatory organs on the tongue related to their life habit.
Tipo: Journal article
Palavras-chave: Tongue; Lingual epithelium; Histology; Taste disks; Caudates.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300030

A Macroanatomical and Histological Study of the Uropygial Gland in the White Stork (Ciconia cicionia)
Provedor de dados: 77
Autores: Kozlu,Tolunay; Bozkurt,Yesim Akaydin; Ates,Sevinc.
The present study was aimed at the macroanatomical and histological investigation and the demonstration of the structural characteristics of the uropygial gland in the white stork. The uropygial gland of two adult male white storks constituted the material of the study. It was determined that the gland was situated subcutaneously in between the caudal aspect of the lumbosacral bone and the first coccygeal vertebrae. The gland was composed of two lobes, which displayed an oval appearance when viewed from above and resembled a water drop when observed medially. Tuft of feathers were present on the caudal margin of each lobe. The present study revealed that the uropygial gland of the white stork is a simple tubular gland, which discharges its secretion into...
Tipo: Journal article
Palavras-chave: White stork; Uropygial gland; Anatomy; Histology.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300010

Postnatal Development of Testis in Gaddi Goat (Capra hircus)
Provedor de dados: 77
Autores: Archana,P; Katiyar,R. S; Sharma,D. N; Farooqui,M. M; Prakash,Ajay.
A study was conducted on the testicles of 30 male Gaddi goats, divided into 3 groups viz; prepubertal (0 day to 18 months), pubertal (&lt;18 months to &amp;gt;5 yrs) and post- pubertal (&amp;gt;5 yrs) ages. The study revealed that the testis was covered by fibroserous tunica albuginia having outer fibrous layer and inner vascular layer with smooth muscle fibers at birth. The tunica albuginia continuously grew in thickness from prepubertal to postpubertal animals. The septula testis arising from the tunica albuginia, divided the parenchyma in lobules and converged at mediastinum testis. Few differentiated and undifferentiated Leydig cells were present in the intertubular spaces of neonates, which enormously increased in pubertal animals and replaced by...
Tipo: Journal article
Palavras-chave: Testis; Histology; Postnatal development; Goat.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000100029

Microscopic Anatomy of the Lower Respiratory System of the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse 1840)
Provedor de dados: 77
Autores: Ibe,C. S; Onyeanusi,B. I; Salami,S. O; Nzalak,J. O.
A qualitative and quantitative study, by light microscopy, was undertaken on the lower respiratory system of the African Giant pouched rat. Specifically, the trachea, bronchi and lungs were stained with Haematoxylin and eosin, Alcian blue at a pH of 2.5 and Periodic Acid-Schiff stains. Three cell types were identified in saggital sections of the trachea: the ciliated cells, basal cells and mucous cells. Fibers of the trachealis muscles in the laminar propria separated the underlying cartilages from the basal cells. Mucous cells were visible only in the membranous portion of the trachea and they were predominant in the rostral and caudal portion of the trachea. Lobar bronchi consisted of cuboidal epithelium and a layer of one or two smooth muscle cells and...
Tipo: Journal article
Palavras-chave: African Giant pouched rat; Lower respiratory system; Histology.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100004

Evaluation of Some Biological Aspects of the Presence of Abrasive Silica and Thickening Silica  in Basic Formulations of Dentifrices
Provedor de dados: 77
Autores: Pedrazzi,Vinícius; Del Ciampo,José Orestes; do Nascimento,Cássio; Issa,João Paulo Mardegan.
The aim of this study was to evaluate some biological characteristics and toxicity of basic formulations of dentifrices containing such substances, and to compare them with two existing products in market which also contains silic in their formulations. In this way, it was evaluated some biological parameters: weight of the animals, oral toxicity, hematological parameters, urinary analysis, and histological evaluation. The thrombocytes were also statistically at normal levels. The glutamate-pyruvate transaminase (TGP) showed normal aspect in 5 of the tested groups, as in control. Meanwhile, the oxalacetic transaminase (AST) in one group had a small increase in the control group. Regarding urine, in exception the rats of one group, the rats of the 4 other...
Tipo: Journal article
Palavras-chave: Silica; Dentifrices; Histology; Wistar rats.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100028

Histological Characterization of Sacco's Concentrated Growth Factors Membrane
Provedor de dados: 77
Autores: Bernardi,Sara; Mummolo,Stefano; Tecco,Simona; Continenza,Maria Adelaide; Marzo,Giuseppe.
Along with the emerging needs of the dental patients, numerous techniques for oral tissue stimulation and regeneration were developed to be employed in the modern implant rehabilitation therapies. The Concentrated Growth Factors (CGF) are a relatively new therapeutic presidium that can be used for this purpose, enhancing the regenerative potential property of blood cells. Although literature presents numerous studies evaluating the CGF for their clinical uses and efficacy, data regarding their biological characteristics are very few. The present study evaluates and describes the CGF structural morphology by means of classical histological methods, using haematoxilin-eosin and azan mallory stains. A three layers organization with a fibrin complex network...
Tipo: Journal article
Palavras-chave: Histology; Guided bone regeneration; Implant dentistry; Concentrated growth factor.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100019

The Histo-morphometric Evidences of Vernonia amygdalina Leaf Extract-induced Testicular Toxicity
Provedor de dados: 77
Autores: Saalu,L. C; Akunna,G. G; Oyewopo,A. O.
Vernonia amygdalina (bitter-leaf) is native to West Africa but occurs mostly in its cultivated form in various parts of central and southern Nigeria. It is a dark-green leafy vegetable commonly used in cooking and as folkloric medicine for the management of several diseases in Nigeria. In the present study, the effects of varying doses of ethanolic leaf extract of Vernonia amygdalina on the rat testis histo-morphometry were investigated. Forty male wistar rats were divided into groups of four. Group A, as the control was given 10 ml/kg/day/oral distilled water while Group B, C and D subsequently treated with 100, 300 and 600 mg/kg/day/oral route Vernonia amygdalina leaves extract respectively for 56 days. Results showed that Group B rats had normal testis...
Tipo: Journal article
Palavras-chave: Vernonia amygdalina; Histology; Morphometry; Testis; Wistar rat.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200052

Prenatal Development of Pelvic Urethra in Goat (Capra hircus)
Provedor de dados: 77
Autores: Vrema,Abhinov; Archana,P; Farooqui,M. M; Prakash,Ajay.
The study was conducted on the embryo/foeti of goat from 0-150 days of gestation, divided into group I (0-30 days), group II (31-60 days), group III (61-90 days), group IV (91-120 days) and group V (121-150 days of gestation). In group I whole embryo was processed and serial sections were cut whereas, in rest of the groups, pelvic urethra was dissected out and the tissues from the representative areas were used for the study. Grossly, on 49.33 days of gestation the pelvic urethra was present in the form of smooth cylindrical tube, approximately 4mm in length. The primordial of vesicular gland and bulbourethral gland appeared on 52 days of gestation at the junction of neck of urinary bladder with pelvic urethra and at the junction of pelvic and penile...
Tipo: Journal article
Palavras-chave: Anatomy; Histology; Pelvic urethra; Goat.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200062

Entrapment of the Sural Nerve on Gastrocnemius Muscle: Histological Analysis
Provedor de dados: 77
Autores: De-Paula,Rafael C; Felix,Bruno; Bezerra,Ewerton C; Rodrigues,Mauro R; Fernandes,Rodrigo M. P; Babinski,Marcio A.
Anatomical variations in the formation of the sural nerve are common, although the topographical localization of this nerve is constant. In this report, we describe the histological analysis of anomalous course of the medial sural cutaneous nerve which descended through the gastrocnemius via a tunnel formed within the muscle and fascia. This anatomical curiosity are clinically important when evaluating sensory axonal loss in distal axonal neuropathies since sural nerve mononeuropathy is less likely to occur.
Tipo: Journal article
Palavras-chave: Sural nerve; Gastrocnemius muscle; Variations; Histology.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300022

Marcello Malpighi (1628-1694), Founder of Microanatomy
Provedor de dados: 77
Autores: Romero Reverón,Rafael.
Marcello Malpighi, (1628-1694), Italian physician, anatomist, botanist, histologist and biologist developed methods to study living things by using the newly invented microscope to make a number of important discoveries about living tissue and structures, and initiated the science of microscopic anatomy. For almost 40 years he used the microscope to describe major types of plant and animal structures and, in doing so, discovered major areas of research in botany, embryology, human anatomy and pathology for future generations of biologists. He provided anatomical basis for eventual understanding of human physiological exchanges. Marcello Malpighi was the founder of microanatomy. Many microscopic anatomical structures are named after him: the basal layer,...
Tipo: Journal article
Palavras-chave: Marcello Malpighi; Microscopic anatomy; Microscope; Histology.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000200015

Comparative Intestinal Histomorphology of Five Species of Phyllostomid Bats (Phyllostomidae, Microchiroptera): Ecomorphological Relations with Alimentary Habits
Provedor de dados: 77
Autores: Gadelha-Alves,Rafaela; Rozensztranch,Andréa Melo Da Silva; Rocha- Barbosa,Oscar.
The intestines of Sturnira lilium, Phyllostomus hastatus, Carolliaperspicillata, GlossophagasoricinaíindDesmodus rotundus were analized through macroscopic, morphometric and light microscopy studies. The species studied presented some common charactenstics generally found in bats, such as the absence of a caecum and an appendix. The frugivorous bat S. lilium has a longer intestine than the other species. The intestinal epithelium is of the simple columnar type, constituted of absorptive cells characterized by microvilli and goblet cells, which in all the species proved to be PAS + and AB +. These cells presented some differences in quantity and in distribution among the species. The intestinal mucosa presented morphologic and morphometric differences, such...
Tipo: Journal article
Palavras-chave: Intestines; Bats; Phyllostomidae; Histology; Histochemistry; Micrometry; Ecomorphology.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300014

The Plantar Aponeurosis in Fetuses and Adults: An Aponeurosis or Fascia?
Provedor de dados: 77
Autores: Kalicharan,A; Pillay,P; Rennie,C.O; De Gama,B.Z; Satyapal,K.S.
The plantar aponeurosis (PA), which is a thickened layer of deep fascia located on the plantar surface of the foot, is comprised of three parts. There are differing opinions on its nomenclature since various authors use the terms PA and plantar fascia (PF) interchangeably. In addition, the variable classifications of its parts has led to confusion. In order to assess the nature of the PA, this study documented its morphology. Furthermore, a pilot histological analysis was conducted to examine whether the structure is an aponeurosis or fascia. This study comprised of a morphological analysis of the three parts of the PA by micro- and macro-dissection of 50 fetal and 50 adult cadaveric feet, respectively (total n=100). Furthermore, a pilot histological...
Tipo: Journal article
Palavras-chave: Aponeurosis; Fascia; Histology; Morphology; Embryology.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200048

Morphology, Histology and Histochemistry of the Digestive System of South American Catfish (Rhamdia quelen)
Provedor de dados: 77
Autores: Hernández,D. R; Pérez Gianeselli,M; Domitrovic,H. A.
The purpose of the present work was the anatomical, histo logical and histochemical description oí Rhamdia quelen juvenile digestive system. Samples of gut were fixed, dehydrated and included in paraffin and then stained with haematoxylin and eosin. For the identification and differentiation of mucosubstances the preparations were treated with Periodic Acid Schiff, Alcian Blue pH 0,4 and 2,5 andPAS/AB pH 2,5. Anatomical details of the oesophagus were like a short tube with primary and secondary mucous folds. The stratified epithelium is composed of three cellular types: small cells, abundant goblet cells with acid and neutral mucosubstances (MS) and large acid cells. The stomach is J-shaped and its mucosa presents broad and deep folds in relaxing state....
Tipo: Journal article
Palavras-chave: Rhamdia quelen; Histology; Digestive System.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000100019

Histological Study of the Oesophagus and Stomach in Grey-Backed Shrike (Lanius tephronotus)
Provedor de dados: 77
Autores: Zhu,Lei.
The microstructure of oesophagus and stomach in grey-backed shrike were examined by means of light microscopy. The results showed that the oesophagus glands were mucous glands, the shedding glandular cells and the mucin from the oesophagus glands secreted to the lumen. The number of the glands in the thoracic part was less than that of in the cervical part. The lumens of the glands showed an intense positive periodic acid-Schiff and Alcian blue reaction. There were two types of glands in the lamina propria. The simple tubular glands were located in the superficial lamella of the lamina propria, while compound tubular glands were located in the deep lamella. The epithelium was lined by a layer of cuticle in the intermediate zone between the proventriculus...
Tipo: Journal article
Palavras-chave: Lanius tephronotus; Oesophagus; Stomach; Histology.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000200009

Histological aspects and protein content of Apis mellifera L. Worker venom glands: the effect of electrical shocks in summer and winter
Provedor de dados: 79
Autores: ABREU,R.M.M.; MORAES,R.L.M. SILVA de; MALASPINA,O.
This paper analyzes the summer and winter total protein content of 7, 14, 21, 28, 35, and 40-day old Apis mellifera L. worker venom glands before (control) and 24 and 96 hours after applying electrical shocks for venom extraction (experimental). During venom extraction, 7-day old workers responded more slowly and weakly to electrical shocks. This response intensifies with age, so that the workers approaching 20 days old respond faster and more aggressively to the shocks. Statistical analysis, using the non-parametric Wilcoxon and Kruskall-Wallis tests and complemented by the Jonckheere test, showed that the protein content varied from one age to another in the experimental group, which was well distinguishable from the values in the control Group in summer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bees; Histology; Protein content; Summer; Winter; Electrical shock; Venom gland; Apis mellifera.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000100006

Copulation of Opisthogonimus fonsecai Ruiz &amp;amp; Leão, 1942 (Trematoda, Digenea, Plagiorchiidae), parasite of Bothrops moojeni Hoge, 1966 (Serpentes, Viperidae)
Provedor de dados: 80
Autores: Silva,R. J.
Copulation in Opisthogonimus fonsecai Ruiz &amp;amp; Leão, 1942 (Trematoda, Digenea, Plagiorchiidae), parasite of Bothrops moojeni Hoge, 1966 (Serpentes, Viperiade), was reported. Data on the histology of the cirrus and metraterm of the copulants were presented. Morphology of the cirrus was also examined by scanning electron microscopy.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Copulation; Opisthogonimus fonsecai; Trematoda; Histology; SEM.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000100008

Acute hepatotoxicity of Crotalus durissus terrificus (South American rattlesnake) venom in rats
Provedor de dados: 80
Autores: França,RF; Vieira,RP; Ferrari,EF; Souza,RA; Osorio,RAL; Prianti-Jr,ACG; Hyslop,S; Zamuner,SR; Cogo,JC; Ribeiro,W.
Venom of the South American rattlesnake, Crotalus durissus terrificus (Cdt), presents myotoxic and neurotoxic outcomes, but reports on its effects on the liver are scarce. This study examined the hepatotoxicity resulting from Cdt venom administration (100, 200 and 300 µg/kg) in male Wistar rats. Animals were studies at 3, 6, 9 and 12 hours after venom injection. The hepatotoxicity was assessed through serum levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (AP), gamma glutamyl transferase (GGT), bilirrubin and also by histopathological evaluation. All the different concentrations of Cdt venom resulted in increased levels of hepatic enzymes, when compared with the control group, except for the 100 µg/kg dose,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalus durissus terrificus; Hepatotoxicity; Histology; AST; ALT; Rattlesnake; Liver enzymes; Venom.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000100007

The venom gland of the scorpion species Euscorpius mingrelicus (Scorpiones: Euscorpiidae): morphological and ultrastructural characterization
Provedor de dados: 80
Autores: Yigit,N; Benli,M.
The histology and ultrastructure of venom glands in the scorpion Euscorpius mingrelicus (Kessler, 1874) are described and illustrated in the current study for the first time by employing light microscopy and transmission electron microscopy (TEM). The venom apparatus is composed of a pair of venom glands and a stinger, both situated in the last segment of the metasoma. The venom glands are completely separate but similar. The two glands are segregated within the telson by striated muscle bundles, and their outer surfaces are surrounded by a cuticle. An internal layer constitutes the secretory epithelium. This epithelium is made up of simple columnar cells. The nucleus and organelles involved in cellular synthetic activity are situated basally. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euscorpius mingrelicus; Scorpion; Telson; Venom gland; Histology; Ultrastructure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300007

Adaptaciones morfológicas de la lengua de Desmodus Rotundus Rotundus (Chiroptera: Phyllostomidae) en función de la alimentación
Provedor de dados: 81
Autores: Mollerach,Marcos I.; Mangione,Susana.
An analysis of the external morphology and histomorphology of the tongue, as well as an histochemical analysis of the glands of Desmodus rotundus, are here presented with the purpose of establishing a correlation between these structures and the feeding habits of this species. In the lingual surface they have the typical filiform papillae modified to different degrees of keratinization, and there are fungiform-like papillae in less amount. The intrinsic musculature and the presence of lynphocitary infiltration are described; the presence of important nervous packages was observed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Desmodus rotundus; Feeding habits; Histology; Tongue.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832004000200005

Anatomy, functional morphology, evolutionary ecology and systematics of the invasive gastropod Cipangopaludina japonica (Viviparidae: Bellamyinae)
Provedor de dados: 16
Autores: Bocxlaer, B. Van; Strong, E.E.
The anatomy, functional morphology and evolutionary ecology of the Viviparidae, and the subfamily Bellamyinae in particular, are incompletely known. Partly as a result, genealogical relationships within the family remain poorly understood. Because of this lack in knowledge, few informed hypotheses exist on ancestral states, how differences in body plans between the subfamilies evolved, and how the peculiar biogeographic distribution patterns of viviparids have arisen. Here we document the anatomy, morphology, life history and systematics of Cipangopaludina japonica, a Japanese species that has been introduced into North America, to resolve taxonomic confusion and to improve our understanding of how form and function are related in bellamyines. Anatomical...
Tipo: Article / Letter to the editor
Palavras-chave: Basal Architaenioglossa; Bellamya; Fecundity; Geometric morphometrics; Histology; Reproductive anatomy; Sexual dimorphism; 42.73.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/609995

Histologie comparée des fosses nasales de quelques Tortues marines (Dermochelys coriacea et Chelonia mydas) et d’eaux douces (Emys orbicularis et Pseudemys scripta) (Reptilia, Dermochelyidae, Cheloniidae, Emydidae)
Provedor de dados: 16
Autores: Saint-Girons, H.
Comparative histological studies carried out on the nasal cavity of four species of turtles showed that the sea turtles have a more or less regressed olfactive epithelium compared to that of the Emydidae but that their vomeronasal epithelium is more developed. The location of the vomeronasal epithelium in the cavum also differs. The data suggest that the Dermochelyidae were adapted to a strict aquatic life a long time before the Cheloniidae.
Tipo: Article / Letter to the editor
Palavras-chave: Testudines; Nasal cavities; Sensory epithelium; Histology.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/504031

Morphology, anatomy and histology of Doto uva Marcus, 1955 (Opisthobranchia: Nudibranchia) from the Chilean coast
Provedor de dados: 16
Autores: Fischer, M.A.; Velde, G. van der; Roubos, E.W.
Doto uva Marcus, 1955 is a nudibranch species recorded from the Brazilian and Chilean coast. In spite of its wide distribution, D. uva has been described only superficially, mainly as to the pattern of its coloration, external morphology, radular teeth and reproductive system. Here we substantially extend this description, paying special attention to the morphology, anatomy and histology of the digestive and reproductive system. Furthermore, new data on the morphology of the central nervous system and its cell types are given, and finally, the egg mass is described. On the basis of these data, we consider the Doto specimens described from Chile conspecific with those from Brazil.
Tipo: Article / Letter to the editor
Palavras-chave: Opisthobranchia; Nudibranchia; Doto; Histology; Morphology; Chilean coast; 42.73.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/214538

Corallimorphus profundus in shallow Antarctic habitats: Bionomics, histology, and systematics (Cnidaria: Hexacorallia)
Provedor de dados: 16
Autores: Riemann-Zürneck, K.; Iken, K.
In March 2000 and November/December 2001 thirteen specimens of Corallimorphus profundus Moseley, 1877, a conspicuous, anemone-like cnidarian, were hand-sampled by SCUBA diving in 30 to 40 m depth off US Palmer Station, Antarctic Peninsula. Corallimorphus species were formerly recorded only from deep water habitats from where they had been brought up more or less damaged, with most of their epithelia lost or macerated. The present well preserved specimens offer the opportunity to study various aspects of the species’ morphology and biology, particularly as one mature female contained a full cycle of oogenesis besides two batches of brooded developmental stages. Most of the results obtained demonstrate that the genus Corallimorphus shows features and...
Tipo: Article / Letter to the editor
Palavras-chave: Corallimorpharia; Corallimorphidae; Corallimorphus; Nectactis; Scleractinia; Micrabaciidae; Leptopenus; Stephanophyllia; Letepsammia; Histology; Cnidom; Reproduction; Ecology; Systematics; Antarctic Peninsula; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220566

A histological study of microsporogenesis in Tarenna gracilipes (Rubiaceae)
Provedor de dados: 16
Autores: Vinckier, S.; Smets, E.
We studied the microsporogenesis in Tarenna gracilipes (Hayata) Ohwi, with special attention to the mode of exine deposition and tapetum development. We based this research on light (LM), scanning electron (SEM) and transmission electron microscopic (TEM) observations of developing anthers of T. gracilipes, from the microspore mother cell stage towards anther dehiscence. Evidence is supplied that the microsporogenesis in T. gracilipes can be considered as simultaneous. Columellae, foot layer and tectum develop in a fibrillar matrix. Similar with earlier studies in Rubiaceae species, a single white line formed near the plasmalemma in the extra-apertural region. The developing endexine dilated into several white line centered lamellae at the apertures. An...
Tipo: Article / Letter to the editor
Palavras-chave: Tarenna gracilipes; Rubiaceae; Microsporogenesis; Exine deposition; Tapetum development; Histology; Light microscopy; Scanning.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407305

Morphological study of the hindgut in larvae of Anticarsia gemmatalis Hübner(Lepidoptera: Noctuidae)
Provedor de dados: 82
Autores: Levy,Sheila M.; Falleiros,Ângela M.F.; Moscardi,Flávio; Gregório,Elisa A.; Toledo,Luis A.
The velvetbean caterpillar (Anticarsia gemmatalis Hübner) has great economical interest as it affects the soybean crop worldwide. This work describes the morphology of the hindgut in A. gemmatalis larvae emphasizing their histological aspects. Distinct morphological regions, identified as pylorus, ileum, colon and rectum, constitute the hindgut of A. gemmatalis. A thin cuticular intima, a simple epithelium and muscular layer compose the hindgut wall, independent of the region. Microspines project from the cuticular intima in the posterior interstitial ring, between the midgut and the hindgut, and the posterior pyloric region. A single circular layer of large fibers, differing from the other hindgut regions that present two layers of muscular fibers, forms...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestive tube; Histology; Velvetbean caterpillar; Insect.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000400005

Morphology of male reproductive system of two solitary bee species (Hymenoptera: Apidae)
Provedor de dados: 82
Autores: Araújo,Vinícius A; Freitas,Felipe V; Moreira,Jane; Neves,Clóvis A; Lino-Neto,José.
Bees can form all levels of social organization, from solitary to advanced eusocial societies. Although 80% of the species exist as solitary species, most researches emphasize social species. This study focuses on the description of the male reproductive system of the solitary beesThygater analis (Lepeletier) and Melitoma segmentaria (Fabricius) and searches for traits that support behavioral and phylogenetic studies. The reproductive system of males were dissected, fixed in 2.5% glutaraldehyde in 0.1 M sodium cacodylate buffer pH 7.2 and post-fixed with 1% osmium tetroxide. The tissue was dissected and included for light microscopy. The species presented similar anatomical traits, including paired testicles, seminal vesicles, deferent ducts, accessory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accessory gland; Histology; Thygater analis; Melitoma segmentaria.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400020

Tegumentary epithelial glands in the abdomen of virgin and physogastric queens of the stingless bee Scaptotrigona postica Latreille (Meliponini: Trigonina)
Provedor de dados: 82
Autores: Abdalla,Fábio C.; Cruz-Landim,Carminda da; Gracioli,Luciana F.
In the eusocial worker bees, portions of the epithelium of the abdominal epidermis may become hypertrophied and glandular, and produce the wax used to build the brood alveoli. In meliponine bees, the presence of similar epithelium was already observed in the queens, but its function is still unknown. Would this epithelium have homologous function in the workers? May the queens display other functions, besides reproduction, related to those considered exclusive of workers? In order to contribute to solve these questions, a histological and ultrastructural study of the tegumentary epithelial glands of the third tergite was carried out in virgins and physogastric queens of Scaptotrigona postica Latreille. The glandular tegumentary epithelium was easily...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wax; Meliponine; Histology; Microscopy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000100006

Morphology of male reproductive system in three species of Trypoxylon (Trypargilum) Richards (Hymenoptera: Crabronidae)
Provedor de dados: 82
Autores: Moreira,Polyana A.; Araújo,Vinícius A.; Zama,Uyrá; Lino-Neto,José.
Variations in the adult male reproductive system among different groups of Hymenoptera offer characteristics that help studies on behavior and phylogenetics. The objective of this study was to describe the adult male reproductive system of three Trypoxylon (Trypargilum) species. For that, tissues were disseced, fixed in 2.5% glutaraldehyde in 0.1 M sodium cacodylate buffer, pH 7.2 and postfixed in 1% osmium tetroxide. The material was dehydratated and embedded for light and electron transmission microscopes. The species have similar reproductive systems, which are formed by a pair of testes, each one with three fusiforme follicles, from which emerges an efferent duct that later joins forming a deferent duct. The deferent duct opens into an ejaculatory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Testes; Spheciform wasp.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000400012

Induced reproduction in a migratory teleost species by water level drawdown
Provedor de dados: 83
Autores: Chehade,Chayrra; Cassel,Mônica; Borella,Maria Inês.
Captive reproduction is one of the problems faced in aquaculture requiring the manipulation of environmental factors and/or hormonal treatment. Thus, we seek to verify experimentally which gonadal changes were present in mature individuals of Astyanax altiparanae arising from decreased water level. Collections were made every four hours, initiated four hours before and finished 28 hours after stimulation, at the Fish Farming Station of Companhia Energética de São Paulo, São Paulo, Brazil. The gonads were analyzed by light microscopy. The females had ovaries in the spawning capable phase until 12h; in 16h, in a more advanced stage of spawning capable phase; and, from 20h, in the regressing phase. Males had testes in the spawning capable phase until 8h; in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asynchronous reproduction; Characidae; Gametogenesis; Gonadosomatic index; Histology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100205

Morphological and immunohistochemical comparison of the pituitary gland between a tropical Paracheirodon axelrodi and a subtropical Aphyocharax anisitsi characids (Characiformes: Characidae)
Provedor de dados: 83
Autores: Camacho,Laura Rincón; Pozzi,Andrea G.; de Freitas,Eliane G.; Shimizu,Akio; Pandolfi,Matías.
ABSTRACT Cardinal tetra Paracheirodon axelrodi and bloodfin tetra Aphyocharax anisitsi are two species of characids with high trade value as ornamental fish in South America. Although both species inhabit middle water layers, cardinal neon exhibits a tropical distribution and bloodfin tetra a subtropical one. Generally, these species are difficult to grow, so it becomes essential to know some key components of the neuroendocrine system to achieve their reproduction in captivity. Considering the importance of deepening the knowledge of the reproductive physiology through functional morphology, for the first time in this work we performed an anatomical, morphological and immunohistochemical analysis of the pituitary gland of these two species. In both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adenohypophysis; Histology; Neurohypophysis; Ornamental fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100211

Oocyte development and ovarian maturation of the black triggerfish, Melichthys niger(Actinopterygii: Balistidae) in São Pedro e São Paulo Archipelago, Brazil
Provedor de dados: 83
Autores: Branco,Ilka S. L.; Viana,Danielle L.; Félix,Renata T. S.; Véras,Dráusio P.; Hazin,Fábio H. V.
The oogenesis is a key stage in the reproductive development of an organism, which can be best understood from histological analysis of ovaries in different maturity stages. In order to provide information on the reproductive biology of the black triggerfish, M. niger, in particular on its oogenesis process, this study aimed at identifying and characterizing the oocyte development stages and its organization within the different stages of ovarian maturation based on specimens from São Pedro e São Paulo Archipelago. In this present report, a number of 294 ovaries were histologically analyzed. It was verified that they are composed of ovigerous lamellae containing oocytes at different development stages. Five different stages of oogenesis were identified:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Oogenesis; Reef fish; Reproduction; Vitellogenesis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300597

Morphological analysis and description of the ovaries of female silky sharks, Carcharhinus falciformis (Müller &amp;amp; Henle, 1839)
Provedor de dados: 83
Autores: Rêgo,Mariana G.; Hazin,Fábio H. V.; Evêncio Neto,Joaquim; Oliveira,P. G. V.; Soares,Maria Goretti; Torres,Keilla Regina L. S.; Lana,Fernanda O.; Roque,Pollyana C. G.; Santos,Natália L.; Coelho,Rui.
This work aims to study the female reproductive tract of silky sharks, Carcharhinus falciformis, captured in the South and Equatorial Atlantic Ocean. Samples were collected between January 2008 and March 2010 through oceanic commercial vessels that targeted tuna and swordfish, with a total of 17 females collected. The methodologies followed for analyzing the ovaries of those females included both macroscopic and histological analysis. Macroscopically, it was possible to determine that the ovaries on these sharks is suspended by mesenteries in the anterior section of the body cavity, heavily irrigated by blood vessels, and contains a wide range of oocytes. Ovaries were found in three distinct maturational stages: Stage I (Immature), Stage II (Maturing) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Elasmobranchs; Histology; Maturity; Ovary; Reproduction.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400815

A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: a cytogenetic and morphological study
Provedor de dados: 83
Autores: Honji,Renato M.; Caneppele,Danilo; Pandolfi,Matias; Nostro,Fabiana L. Lo; Moreira,Renata G.
ABSTRACT Little is known about reproductive biology of endangered Steindachneridion parahybae , a gonochoristic teleost species inhabiting the Paraíba do Sul River Basin, and herein is the first description of intersex in S. parahybae juvenile. The normal appearance of ovaries and testes in juvenile from the same lot of breeding were also described for comparison, even as cytogenetic analysis was performed in these juveniles. One specimen was a priori classified as female due to the macroscopic characteristic of ovaries, with small yellow oocytes, without fringes (a main characteristic of catfish male), and larger than testes; however the microscopic analysis revealed the presence of ovotestes, including the complete spermatogenesis. S. parahybae had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Karyotype; Ovary; Ovotestes; Testicles.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400206

Identification of the stages of ovarian maturation of the Argentine hake Merluccius hubbsi Marini, 1933 (Teleostei: Merlucciidae): advantages and disadvantages of the use of the macroscopic and microscopic scales
Provedor de dados: 83
Autores: Honj,Renato M.; Vaz-dos-Santos,André M.; Rossi-Wongtschowsk,Carmen Lúcia D. B.
The Argentine hake Merluccius hubbsi is a demersal-pelagic species on which few studies have been undertaken, despite its importance for the fisheries of the South-Southeastern Brazilian region, . The species is the most important commercial fishery resource in Uruguay and Argentina, where several studies have permitted the proper monitoring of the species. The ovarian maturation of the Argentine hake is analysed in this study. A scale of maturation is presented in the light of the oocyte development and the use of macro and microscopic scales of ovarian maturation are compared. It was detected that the oocyte types and derived structures present in the ovaries are similar to those already described both for the species and for teleosts in general; group...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ovarian development; Histology; Reproduction; Brazil.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300004

Gametogenesis and reproductive cycle of Melanorivulusaff. punctatus (Boulenger, 1895) (Cyprinodontiformes, Rivulidae) in Chapada dos Guimarães, Mato Grosso, Brazil
Provedor de dados: 83
Autores: Cassel,Mônica; Mehanna,Mahmoud; Mateus,Lúcia; Ferreira,Adelina.
The comprehension of the reproductive cycle allows to understand which are the morphological changes that develop in the gonad during this interval. Thus, many studies have been undertaken in order to describe and classify the stages of gonadal development and reproductive status of Neotropical fishes. For this purpose, specimens of Melanorivulusaff. punctatus were collected in a permanent dam in Chapada dos Guimarães, Mato Grosso, Brazil. The gonads were prepared for analysis by light microscopy. The oogenesis and spermatogenesis have been described, characterizing the stages of gonadal development, together with assessments of the gonadosomatic ratio, germ cell count and verification of variation of mature oocytes in females. Throughout the year the male...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gonadossomatic ratio; Histology; Oogenesis; Spermatogenesis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100179

The Pathogenesis of Experimental Infections of Cryptosporidium baileyi in Chickens
Provedor de dados: 19
Autores: Taylor, M. A.; Catchpole, J.; Marshall, R. N.; Green, J. A.
Palavras-chave: Cryptosporidiosis; Bursa of Fabricius; Histology.
Ano: 1996
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/239

Variaciones en el número de miocélulas de la musculatura blanca de la merluza (Merlucciidae, Merluccius hubbsi), en la plataforma argentina
Provedor de dados: 20
Autores: Christiansen, H.E.
This paper describes a method to discriminate different stocks of the Argentine hake (Merluccius hubbsi)based on the counting of white skeletal fibres of the trunk. A total of 713 females were examined from samples coming from a wide area of the Argentine shelf (between 34°30' and 54°00'S)which corresponds to the following systems: Uruguayan, Buenos Aires, northern, central and southern-patagonian. All results may be considered as preliminary due to the incipient nature of the information available on fibre regulation in fish.
Tipo: Journal Contribution
Palavras-chave: Stock identification; Histology; Muscles; Hake fisheries; Muscles; Http://aims.fao.org/aos/agrovoc/c_5003.
Ano: 1982
URL: http://hdl.handle.net/1834/2055

Biologia reproductiva de la saraquita Ramnogaster arcuata (Jenyns, 1842) del estuario del Rio de la Plata.
Provedor de dados: 20
Autores: Rodrigues, K.A.
The reproductive biology of Ramnogaster arcuata inhabiting waters of the Rio de la Plata estuary (Argentina - Uruguay) was studied by using macroscopic and histological analysis of ovaries. R. Arcuata specimens were collected from two research cruises of the National Institute of Fisheries Research and Development (INIDEP) carried out in June 1998 and June 1999. During these surveys, bottom salinity and temperature data were also registered. In addition, information about annual catches of this species in the Rio de la Plata, obtained from different INIDEP cruises performed during the last ten years, was analyzed. During winter, a prevalence of R. arcuata individuals was observed in the Rio de la Plata estuary. In summer, this species apparently moves...
Tipo: Theses and Dissertations
Palavras-chave: Sexual reproduction; Ovaries; Fecundity; Spawning seasons; Histology; Fish eggs; Oocytes; Environmental conditions; Ovaries; Sexual reproduction; Fecundity; Oocytes; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_26876; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_29343; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2005
URL: http://hdl.handle.net/1834/1485

Distribución de desovantes y estimación de variables reproductivas del efectivo norteño de merluza (Merluccius hubbsi) (35º'S-41º'S) durante mayo de 2009
Provedor de dados: 20
Autores: Rodrigues, K.A.; Macchi, G.J.
Spawning and reproductive variables of the northern hake stock were analyzed using macroscopic and histologic gonad information derived from samples collected in May 2009. The study includes estimates of batch fecundity, spawning frequency, oocyte dry weight and size at first maturity. During May 2009 the reproductive activity of the northern hake stock took place mainly near the 50 m isobath, north of 37° S. Spawning occurred within a temperature range of 9 °C-15 °C that coincided with a bottom thermal front. Size at first maturity, much lower than that reported at the beginning of the 1980s, showed differences between males (27.16 cm TL) and females (32.84 cm TL). The reproductive frequency was estimated at one spawning every 13 days and mean batch...
Tipo: Journal Contribution
Palavras-chave: Stocks; Spawning populations; Histology; Fecundity; Gadoid fisheries; Merluccius hubbsi; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4883

Biología reproductiva comparada de especies de la familia Sciaenidae en aguas del Río de la Plata y Costa Bonaerense
Provedor de dados: 20
Autores: Militelli, M.I.
In the Argentine Sea (SW Atlantic), particularly in the Bonaerense Coastal Zone there are two frontal zones, the waterfront area of the Rio de la Plata and the southern area of the province called El Rincón. The fauna of the Bonaerense Coastal Area has its own characteristics and in the case of fish is defined by dominant species, as is the whole of Sciaenidae family composed of seven species: white mouth croaker (Micropogonias furnieri), striped weakfish (Cynoscion guatucupa), king weakfish (Macrodon ancylodon), black drum (Pogonias cromis), Argentine croaker (Umbrina canosai), drum (Paralonchurus brasiliensis) and southern kingfish (Menticirrhus americanus). In the present work is discussed in a comparative way various aspects of the reproductive cycle...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater fish; Reproduction; Spawning grounds; Coastal waters; Fronts; Environmental conditions; Histology; Reproduction; Spawning grounds; Coastal waters; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_25205; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2007
URL: http://hdl.handle.net/1834/3549

Gonocorismo en la vieira patagonica Zygochlamys patagonica (King y Broderip, 1832) en el Banco Reclutas, Argentina
Provedor de dados: 20
Autores: Campodónico, S.; Macchi, G.J.; Lasta, M.L.
Different cases of hermaphroditism in Zygochlamys patagonica were described through histological analysis. Samples were collected in Reclutas Bed. Argentine Sea, SW Atlantic. The hermaphroditism incidence was 0.14. . Thus, the protandric hermaphroditism hypothesis previously suggested by some autors was discarded.
Tipo: Journal Contribution
Palavras-chave: Gonads; Histology; Hermaphroditism; Protandry; Hermaphroditism; Gonads; Http://aims.fao.org/aos/agrovoc/c_3571; Http://aims.fao.org/aos/agrovoc/c_34291.
Ano: 2004
URL: http://hdl.handle.net/1834/1502

Reproductive biology and histological studies of the grey mullet, liza ramada, (risso, 1826) in lake timsah, suez canal
Provedor de dados: 20
Autores: Ramadan, A.M.; El-Halfawy, M.M.; Mahmoud, W.F.
Reproductive characteristics of Liza ramada in Timsah Lake showed that the male reaches first sexual maturity smaller than the female at a total body length of 14 cm. and 16 cm., respectively. Overall sex ratio is 1: 1.7 for males to females. The gonado-somatic index of males was lower than that of females. Where, the maximum GSI values were recorded in November 5.03 % and 12.4 % for males and females, respectively. The maturity stages of male and female Liza ramada are morphologically separated according to the changes in shape, size and colour of the gonad in different successive stages. These stages are virgin, maturing virgin, developing, developed, gravid and spent stages. Histologically, the oocyte maturation showed the following phases; first growth...
Tipo: Journal Contribution
Palavras-chave: Field study; Histology; Reproductive cycle; Mullet fisheries.
Ano: 2007
URL: http://hdl.handle.net/1834/1905

Determinación de diferentes conjuntos de merluza común (Merluccius hubbsi) en el Mar Argentino mediante el estudio histológico de ovarios
Provedor de dados: 20
Autores: Cornejo, A.M.
Tipo: Theses and Dissertations
Palavras-chave: Ovaries; Histology; Ecosystems; Fish eggs; Fish larvae.
Ano: 1985
URL: http://hdl.handle.net/1834/4188

Efecto de niveles de proteína en la dieta sobre el crecimiento de juveniles de Camarón Rosado (Farfantepenaeus notialis)
Provedor de dados: 20
Autores: Galindo, J.; Fraga, I.; Artiles, M.A.; de Arazoza, M.; Alvarez, J.S.; Pelegrín, E.
To assess the effect of protein levels in diet on growth of pink shrimp juveniles (Farfantepenaeus notialis), two completely randomly experimental designs were carried out, one at laboratory scale during 8 weeks and the second one in fertilized earthen ponds during 20 weeks. Samples of pink shrimps obtained after spawning in the laboratory, were used. Isocaloric practical diets containing 35, 40 and 45% were used in the first experiment and 40 and 45% protein in the second one. In both trials, shrimps fed with 45% protein diet reached the highest growths. The nutritional factors assessed were always better in that organisms fed with the diet of higher protein content. The histological analysis of the hepatopancreas in shrimp feds with diets containing...
Tipo: Proceedings Paper
Palavras-chave: Shrimp culture; Feeding experiments; Histology.
Ano: 2003
URL: http://hdl.handle.net/1834/1951

Nematodes parásitos como indicadores biológicos en las especies Macruronus magellanicus y Merluccius hubbsi (Pisces, Gadiformes)
Provedor de dados: 20
Autores: Incorvaia, I.S.
Parasites nematodes as biological tags of Macruronus magellanicus (longtail hake) and Merluccius hubbsi (hake) colleted between 34°- 55°S in the SW Atlantic were studied. Adult specimens of Hysterothylacium aduncum, Ascarophis marina and Ichthytofilaria argentinensis, and the third-stage specimens of H. aduncum, Anisakis simplex and Contracaecum aduncum were described. Histological studies showed that I. argentinensis provokes tissue reactions in the swim bladder of  M. hubbsi.  A wide distributional range of species can be represented by many fish populations or fishing stocks. As these can overlap in space, the proper identification of stocks is necessary for fisheries management. The parasitologic method is one currently used to determine stocks....
Tipo: Theses and Dissertations
Palavras-chave: Stock identification; Parasites; Indicator species; Abundance; Histology; Marine fish.
Ano: 2002
URL: http://hdl.handle.net/1834/5030

Ecología reproductiva de tres batoideos (Chondrichthyes): iAtlantoraja castelnaui (Rajidae), Rioraja agassizi (Rajidae) y Zapteryx brevirostris (Rhinobatidae). Implicancias de distintas estrategias reproductivas en un escenario de explotación comercial intensiva
Provedor de dados: 20
Autores: Colonello, J.H.
The reproductive ecology of the Chondrichthyans Atlantoraja castelnaui (spotback skate), Rioraja agassizi (rio skate) and iZapteryx brevirostris (lesser guitarfish) is analyzed in this study. The two first are oviparous species that attain 168 mm and 768 mm of maximum total length (MTL), respectively. The third is a viviparous lecitotrophic ray that grows to a MTL of 720 mm. The examined material came from the purchase of samples in the Mar del Plata Port (Buenos Aires prov., Argentina) and from research cruises carried out by the National Institute of Fisheries Research and Development (INIDEP). Two work lines were developed to analyze the reproductive ecology and to validate the reproductive stages of these species, one based on macroscopic analysis of...
Tipo: Theses and Dissertations
Palavras-chave: Marine fish; Reproduction; Animal reproductive organs; Sexual maturity; Histology; Reproduction; Animal reproductive organs; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_29449; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2009
URL: http://hdl.handle.net/1834/3546

Estudio morfologico e histologico del hepatopancreas del langostino Pleoticus muelleri (Bate)(Crustacea, Penaeoidea)
Provedor de dados: 20
Autores: Cuartas, E.I.; Díaz, A.C.; Petriella, A.M.
The decapod crustacean hepatopancreas is a conspicuous and bilobated gland composed of simple, blind-ended tubules, which opens into the pyloric stomach. The gland is completely surrounded by connective tissue which limits also the tubules. In this work midgut gland cells of Argentine shrimp Pleoticus muelleri were investigated under light microscopy. Each tubule has three defined zones: distal, middle and proximal. Four cell types, E-cells (embryonic), F (fibrillar), R (resorptive) and B (secretory) form the epithelium. The histology of the hepatopancreas of P. muelleri is described, emphasizing the particularities in this species whose general features can be compared to that of other decapod crustaceans.
Tipo: Journal Contribution
Palavras-chave: Hepatopancreas; Histology; Organism morphology; Hepatopancreas; Http://aims.fao.org/aos/agrovoc/c_34294.
Ano: 2002
URL: http://hdl.handle.net/1834/1702

Etude des mécanismes de contamination des mollusques bivalves par des neurotoxines à action rapide (FAT) et développement de procédés de détoxification
Provedor de dados: 20
Autores: Medhioub, Walid.
Cette étude à pour objectif de maîtriser les conditions de culture et de production toxinique chez Karenia selliformis et Alexandrium ostenfeldii dans le but de réaliser des contaminations expérimentales indépendamment du caractère aléatoire des proliférations toxiques en zones côtières. Ce travail vise également à étudier l‘impact de l‘alimentation sur la détoxification artificielle de la pa lourde Ruditapes decussatus contaminée par des gymnodimines et de l‘huître Crassostrea gigas contaminées par des spirolides et enfin d‘étudier l‘impact physiologique de ces micro-algues toxiques au niveau des organes accumulateurs des coquillages. Dans un premier temps, il a été mis en évidence que les performances de croissance de K. selliformis (taux de croissance...
Tipo: Theses and Dissertations
Palavras-chave: DETOXICATION; Gymnodimine; Spirolide; Culture; Karenia selliformis; Alexandrium ostenfeldii; Ruditapes decussatus; Histology; Crassostrea gigas.
Ano: 2011
URL: http://hdl.handle.net/1834/4773

Descripción morfológica e histológica del aparato digestivo del calamar Illex argentinus (Cephalopoda: Ommastrephidae)
Provedor de dados: 20
Autores: Ivanovic, M.L.; Brunetti, N.E.
The morphology and histology of the digestive tract of the Argentine short-finned squid Illex argentinus are described. The structures involved are the buccal mass, oesophagus, vestibulum, stomach, caecum, intestine, digestive gland and digestive duct appendages. A differential development of the tissular components in relation to the function of each organ is observed. The musculature of the buccal mass, oesophagus and stomach, organs involved in the mechanical degradation of food is strongly developed. This development is weaker in the caecum where enzymatic digestion and absorption take place and in the intestine. For the same reason, the epithelia of the mucosae of the oesophagus and stomach secrete a thick cuticle whereas those of the caecum and...
Tipo: Journal Contribution
Palavras-chave: Digestive system; Organism morphology; Histology; Digestive system; Http://aims.fao.org/aos/agrovoc/c_2275.
Ano: 2002
URL: http://hdl.handle.net/1834/1582

Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento
Provedor de dados: 20
Autores: Díaz, M.V.
Nutritional condition studies allow the assessment of physiological state of each larva and thus, the establishment of favourable nursery areas which provide better survival and growth. In the present work, morphometrical, histological and biochemical techniques were employed to assess nutritional condition of anchovy, Engraulis anchoita, larvae captured in the Argentine Sea. Its results were complemented with oceanographic data and information about zooplankton abundances, both prey and predators of anchovy larvae. Anchovy larvae abundance and distribution would be mainly determined by physico-chemical variables. Even though no significant differences were found in larval nutritional condition among the studied areas, larval condition was slightly better...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Nutritional requirements; Morphometry; Histology; Hydrography; Nursery grounds; Fish larvae; Nutritional requirements; Hydrography; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2010
URL: http://hdl.handle.net/1834/3548

Dinámica de la metapoblación de almeja panopea Panopea abbreviata en los golfos norpatagónicos
Provedor de dados: 20
Autores: Zaidman, P.C.
Panopea abbreviata es el molusco bivalvo infaunal de mayor tamaño del Mar Argentino. Se distribuye desde Río de Janeiro (Brasil) hasta la Patagonia Argentina. En los golfos San Matías (GSM) y San José (GSJ), conforma una metapoblación que presenta una distribución discontinua, formada por una serie de poblaciones ubicadas a lo largo de las costas.Es el bivalvo más longevo explotado en el Atlántico Sur. En el GSM su pesquería comenzó en el año 2000 y, si bien la misma es incipiente, debido a las características biológico-poblacionales de P. abbreviata es un recurso que requiere de un manejo precautorio. Excepto por estudios preliminares sobre el crecimiento y el ciclo reproductivo, no se contaba con la información básica para manejo. El objetivo general del...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Marine molluscs; Population dynamics; Sustainable management; Age; Growth; Mortality rate; Recruitment; Population structure; Spatial variations; Sex composition; Reproductive cycle; Histology; Environmental conditions.
Ano: 2013
URL: http://hdl.handle.net/1834/5236

Reproducción del pez palo (Percophis brasiliensis) en aguas costeras de la provincia de Buenos Aires
Provedor de dados: 20
Autores: Militelli, M.I; Macchi, G.J.
The reproductive biology of Percophis brasiliensis sampled during December 1998 in coastal waters off the Buenos Aires Province (Argentine Sea) (36°-42°S)was studied using macroscopic and microscopic gonad analysis. Size at first maturity of brazilian flathead showed highly significant differences (P 0.01)between sexes, being 28.98 Lt cm for males and 38.34 Lt cm for females. Microscopic analysis of ovaries showed that this species is a batch spawner. At the beginning of December the reproductive activity decreased and a high percentage of atresia was observed. Spawning females (with hydrated oocytes)were concentrated in shallow waters near Claromeco and Necochea (38°30'-39°S)between 14 and 16°C, coinciding with a bottom thermal front.
Tipo: Journal Contribution
Palavras-chave: Ovaries; Histology; Coastal waters; Ovaries; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2001
URL: http://hdl.handle.net/1834/1864

Numerosidad celular en función del habitat en los tejidos conjuntivos y gonadal en el mejillín (Brachydontes rodriguezi)
Provedor de dados: 20
Autores: Louge, E.
Tipo: Theses and Dissertations
Palavras-chave: Reproduction; Histology; Horizontal distribution.
Ano: 1984
URL: http://hdl.handle.net/1834/4189